Recommended for all writers in English.

1.
The Elements of Style
The Elements of Style 4.18 avg rating — 86,241 ratings
2.
The Chicago Manual of Style
The Chicago Manual of Style 4.30 avg rating — 6,182 ratings
3.
Practical English Usage
Practical English Usage 4.31 avg rating — 1,432 ratings
4.
The American Heritage Dictionary of the English Language
The American Heritage Dictionary of the English Language 4.40 avg rating — 738 ratings
5.
Garner's Modern American Usage
Garner's Modern American Usage 4.60 avg rating — 1,064 ratings
6.
Merriam-Webster's Dictionary of English Usage
Merriam-Webster's Dictionary of English Usage 4.44 avg rating — 188 ratings
7.
How to Do Things with Words
How to Do Things with Words 3.90 avg rating — 2,562 ratings
8.
The Oxford English Dictionary (20 Vol. Set in 5 boxes)
The Oxford English Dictionary (20 Vol. Set in 5 boxes) 4.71 avg rating — 221 ratings
9.
Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation
Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation 3.87 avg rating — 106,070 ratings
10.
The Elements of Journalism: What Newspeople Should Know and The Public Should Expect
The Elements of Journalism: What Newspeople Should Know and The Public Should Expect 3.85 avg rating — 1,689 ratings
11.
Merriam-Webster's Collegiate Dictionary
Merriam-Webster's Collegiate Dictionary 4.33 avg rating — 2,826 ratings
11.
A Dictionary of Modern English Usage
A Dictionary of Modern English Usage 4.23 avg rating — 1,057 ratings
13.
Oxford Dictionary of Current Idiomatic English: Boxed Set of Two Volumes
Oxford Dictionary of Current Idiomatic English: Boxed Set of Two Volumes really liked it 4.00 avg rating — 16 ratings
14.
The Compact Edition of The Oxford English Dictionary, Complete Text Reproduced Micrographically
The Compact Edition of The Oxford English Dictionary, Complete Text Reproduced Micrographically 4.89 avg rating — 98 ratings
15.
McGraw-Hill's Dictionary of American Idioms and Phrasal Verbs
McGraw-Hill's Dictionary of American Idioms and Phrasal Verbs 4.21 avg rating — 24 ratings
16.
Roget s Super Thesaurus
Roget s Super Thesaurus 4.37 avg rating — 83 ratings
17.
Complete Plain Words
Complete Plain Words 4.07 avg rating — 307 ratings
17.
Understanding Grammar for Powerful Communication (The Modern Scholar: Way with Words, Vol. 3)
Understanding Grammar for Powerful Communication (The Modern Scholar: Way with Words, Vol. 3) 4.15 avg rating — 195 ratings
17.
The Last Word: The English Language: Opinions and Prejudices
The Last Word: The English Language: Opinions and Prejudices 4.20 avg rating — 5 ratings
17.
The Craft of Research
The Craft of Research 3.92 avg rating — 4,282 ratings
17.
Jackboot Britain
Jackboot Britain 3.63 avg rating — 112 ratings
17.
English Prepositions Explained
English Prepositions Explained 4.40 avg rating — 35 ratings
17.
The Elements of Active Prose
The Elements of Active Prose 4.39 avg rating — 31 ratings
17.
Into the Still Blue (Under the Never Sky, #3)
Into the Still Blue (Under the Never Sky, #3) 4.14 avg rating — 46,940 ratings
17.
On Writing Well: The Classic Guide to Writing Nonfiction
On Writing Well: The Classic Guide to Writing Nonfiction 4.24 avg rating — 30,212 ratings
26.
The Synonym Finder
The Synonym Finder 4.54 avg rating — 567 ratings
26.
Alphabet Juice: The Energies, Gists, and Spirits of Letters, Words, and Combinations Thereof; Their Roots, Bones, Innards, Piths, Pips, and Secret Parts, Tinctures, Tonics, and Essences; With Examples of Their Usage Foul and Savory
Alphabet Juice: The Energies, Gists, and Spirits of Letters, Words, and Combinations Thereof; Their Roots, Bones, Innards, Piths, Pips, and Secret Parts, Tinctures, Tonics, and Essences; With Examples of Their Usage Foul and Savory 3.61 avg rating — 878 ratings
26.
The Adventure of English
The Adventure of English 3.94 avg rating — 5,091 ratings
26.
On Writing: A Memoir of the Craft
On Writing: A Memoir of the Craft 4.34 avg rating — 310,171 ratings
26.
Roget's International Thesaurus
Roget's International Thesaurus 4.44 avg rating — 1,009 ratings
31.
Webster's New Dictionary of Synonyms
Webster's New Dictionary of Synonyms
by: Anonymous
4.54 avg rating — 39 ratings
31.
The Associated Press Stylebook 2009 (Associated Press Stylebook and Briefing on Media Law)
The Associated Press Stylebook 2009 (Associated Press Stylebook and Briefing on Media Law) 4.21 avg rating — 1,815 ratings
31.
Choose the Right Word: A Contemporary Guide to Selecting the Precise Word for Every Situation
Choose the Right Word: A Contemporary Guide to Selecting the Precise Word for Every Situation 4.23 avg rating — 73 ratings
31.
Mrs. Maddox (Beautiful, #1.5)
Mrs. Maddox (Beautiful, #1.5) really liked it 4.00 avg rating — 21,285 ratings
31.
Elmore Leonard's 10 Rules of Writing
Elmore Leonard's 10 Rules of Writing 3.84 avg rating — 2,118 ratings
36.
The Deluxe Transitive Vampire: The Ultimate Handbook of Grammar for the Innocent, the Eager, and the Doomed
The Deluxe Transitive Vampire: The Ultimate Handbook of Grammar for the Innocent, the Eager, and the Doomed 4.10 avg rating — 1,534 ratings
36.
The Chicago Guide to Communicating Science
The Chicago Guide to Communicating Science 3.92 avg rating — 86 ratings
36.
Cambridge Advanced Learner's Dictionary with CD-ROM
Cambridge Advanced Learner's Dictionary with CD-ROM 4.47 avg rating — 51 ratings
36.
The Writing Life
The Writing Life 3.98 avg rating — 18,001 ratings
40.
Oxford Collocations Dictionary for Students of English
Oxford Collocations Dictionary for Students of English 4.51 avg rating — 132 ratings
40.
Bird by Bird
Bird by Bird 4.24 avg rating — 108,490 ratings
42.
The New Fowler's Modern English Usage
The New Fowler's Modern English Usage 4.23 avg rating — 1,057 ratings
43.
The Word Finder
The Word Finder 4.30 avg rating — 20 ratings
43.
The Elements of Grammar
The Elements of Grammar
by: Shertzer
3.90 avg rating — 251 ratings
43.
Merriam Webster's Dictionary Of Synonyms: A Dictionary Of Discriminated Synonyms With Antonyms And Analogous And Contrasted Words
Merriam Webster's Dictionary Of Synonyms: A Dictionary Of Discriminated Synonyms With Antonyms And Analogous And Contrasted Words 4.54 avg rating — 39 ratings
46.
You Have a Point There: A Guide to Punctuation and Its Allies
You Have a Point There: A Guide to Punctuation and Its Allies 4.14 avg rating — 22 ratings
46.
A Practical English Grammar
A Practical English Grammar 4.20 avg rating — 498 ratings
48.
Usage and Abusage 3e: A Guide to Good English
Usage and Abusage 3e: A Guide to Good English 3.93 avg rating — 198 ratings
49.
The Cambridge Guide to English Usage
The Cambridge Guide to English Usage 4.32 avg rating — 25 ratings
49.
English Grammar in Use With Answers: Reference and Practice for Intermediate Students
English Grammar in Use With Answers: Reference and Practice for Intermediate Students 4.31 avg rating — 1,956 ratings
51.
What's What: A Visual Glossary of the Physical World
What's What: A Visual Glossary of the Physical World 4.07 avg rating — 27 ratings
52.
The New Partridge Dictionary of Slang and Unconventional English (Volume II)
The New Partridge Dictionary of Slang and Unconventional English (Volume II) it was amazing 5.00 avg rating — 1 rating
53.
The Firefly Five Language Visual Dictionary: English, Spanish, French, German, Italian
The Firefly Five Language Visual Dictionary: English, Spanish, French, German, Italian 4.55 avg rating — 33 ratings
53.
The American Heritage Dictionary
The American Heritage Dictionary 4.32 avg rating — 271 ratings
55.
A Dictionary of Contemporary American Usage
A Dictionary of Contemporary American Usage 3.92 avg rating — 12 ratings
56.
Harper Dictionary of Contemporary Usage
Harper Dictionary of Contemporary Usage 4.46 avg rating — 13 ratings
57.
Brewer's Dictionary of Phrase and Fable
Brewer's Dictionary of Phrase and Fable 4.41 avg rating — 922 ratings
58.
Dictionary of Word Roots and Combining Forms
Dictionary of Word Roots and Combining Forms 4.32 avg rating — 134 ratings
59.
Harper's English Grammar
Harper's English Grammar 3.83 avg rating — 6 ratings
60.
Origins: A Short Etymological Dictionary of Modern English
Origins: A Short Etymological Dictionary of Modern English 4.32 avg rating — 63 ratings
61.
Essentials of English Grammar: 25th impression, 1987
Essentials of English Grammar: 25th impression, 1987 3.82 avg rating — 11 ratings
62.
Oxford Collocations Dictionary for Students of English
Oxford Collocations Dictionary for Students of English 4.51 avg rating — 132 ratings
63.
A Dictionary Of Catch Phrases From The Sixteenth Century To The Present Day
A Dictionary Of Catch Phrases From The Sixteenth Century To The Present Day 4.13 avg rating — 15 ratings
64.
The Oxford Thesaurus: An A-Z Dictionary Of Synonyms
The Oxford Thesaurus: An A-Z Dictionary Of Synonyms
by: Various
3.50 avg rating — 4 ratings
65.
Oxford Complete Wordfinder
Oxford Complete Wordfinder 4.57 avg rating — 7 ratings
66.
Oxford Advanced Learner's Dictionary
Oxford Advanced Learner's Dictionary 4.35 avg rating — 1,220 ratings
67.
The Routledge Dictionary of Modern American Slang and Unconventional English
The Routledge Dictionary of Modern American Slang and Unconventional English 4.50 avg rating — 8 ratings