If you like Robert B. Parker then try...

1.
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2.
The Most Dangerous Game
The Most Dangerous Game 4.11 avg rating — 434 ratings
2.
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4.
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5.
Bright Orange for the Shroud
Bright Orange for the Shroud 4.10 avg rating — 5,094 ratings
6.
Lullaby Town (Elvis Cole, #3)
Lullaby Town (Elvis Cole, #3) 4.16 avg rating — 14,855 ratings
7.
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The Hot Kid (Carl Webster, #1) 3.79 avg rating — 5,467 ratings
8.
Always Outnumbered, Always Outgunned
Always Outnumbered, Always Outgunned 4.18 avg rating — 4,426 ratings
9.
Luciano's Luck
Luciano's Luck 3.87 avg rating — 1,691 ratings
10.
One for the Money (Stephanie Plum, #1)
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11.
Death Squad (The Executioner, #2)
Death Squad (The Executioner, #2) 3.84 avg rating — 1,125 ratings
12.
Spy Hook (Bernard Samson, #4)
Spy Hook (Bernard Samson, #4) 4.03 avg rating — 3,778 ratings
13.
Spy Line (Bernard Samson, #5)
Spy Line (Bernard Samson, #5) 4.07 avg rating — 3,104 ratings
14.
Along Came a Spider (Alex Cross, #1)
Along Came a Spider (Alex Cross, #1) 4.13 avg rating — 480,554 ratings
15.
Early One Morning
Early One Morning 3.89 avg rating — 461 ratings
16.
Bonecrack
Bonecrack 4.14 avg rating — 5,092 ratings
17.
The '44 Vintage
The '44 Vintage 4.01 avg rating — 140 ratings
18.
Swag
Swag 3.90 avg rating — 5,683 ratings
19.
The Impossible Virgin (Modesty Blaise #5)
The Impossible Virgin (Modesty Blaise #5) 4.09 avg rating — 487 ratings
20.
A Taste for Death (Modesty Blaise, #4)
A Taste for Death (Modesty Blaise, #4) 4.16 avg rating — 556 ratings
21.
The Night Charter (Camaro Espinoza, #1)
The Night Charter (Camaro Espinoza, #1) 3.60 avg rating — 452 ratings
22.
Everybody Dies (Matthew Scudder, #14)
Everybody Dies (Matthew Scudder, #14) 4.13 avg rating — 3,610 ratings
23.
Doll (87th Precinct, #20)
Doll (87th Precinct, #20)
by: Ed McBain
3.87 avg rating — 882 ratings
24.
No Place to Hide
No Place to Hide 4.06 avg rating — 84 ratings
25.
Created, the Destroyer (The Destroyer, #1)
Created, the Destroyer (The Destroyer, #1) 3.80 avg rating — 2,675 ratings
26.
Body Scissors
Body Scissors 3.46 avg rating — 24 ratings
27.
Hazell Plays Solomon
Hazell Plays Solomon 3.64 avg rating — 22 ratings
28.
One False Move (Myron Bolitar, #5)
One False Move (Myron Bolitar, #5) 4.13 avg rating — 34,762 ratings
29.
The Dead Women of Juárez
The Dead Women of Juárez 3.49 avg rating — 529 ratings
30.
Taken (Elvis Cole, #15; Joe Pike, #4)
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31.
Lady Yesterday (Amos Walker, #7)
Lady Yesterday (Amos Walker, #7) 3.93 avg rating — 193 ratings
32.
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33.
King Suckerman (D.C. Quartet, #2)
King Suckerman (D.C. Quartet, #2) 3.98 avg rating — 2,554 ratings
34.
Game Without Rules (Calder and Behrens #1)
Game Without Rules (Calder and Behrens #1) 4.10 avg rating — 258 ratings
35.
Mucho Mojo (Hap and Leonard, #2)
Mucho Mojo (Hap and Leonard, #2) 4.13 avg rating — 6,365 ratings
36.
A Trouble of Fools (A Carlotta Carlyle Mystery #1)
A Trouble of Fools (A Carlotta Carlyle Mystery #1) 3.87 avg rating — 3,891 ratings
37.
Sweet Nothing
Sweet Nothing 4.09 avg rating — 316 ratings