books where the murder/mysterious death turns out to be suicide

1.
Everything I Never Told You
Everything I Never Told You 3.83 avg rating — 598,248 ratings
2.
Night Film
Night Film 3.78 avg rating — 94,537 ratings
3.
Dead Man's Mirror : Three Great Hercule Poirot Mysteries ; Dead Man's Mirror ; Murder in the Mews ; Triangle At Rhodes
Dead Man's Mirror : Three Great Hercule Poirot Mysteries ; Dead Man's Mirror ; Murder in the Mews ; Triangle At Rhodes 3.77 avg rating — 27,100 ratings
4.
The Market Basing Mystery: a Hercule Poirot Short Story (Hercule Poirot, #SS-15)
The Market Basing Mystery: a Hercule Poirot Short Story (Hercule Poirot, #SS-15) 3.73 avg rating — 1,626 ratings
5.
Wasps' Nest: a Hercule Poirot Short Story (Hercule Poirot, #SS-29)
Wasps' Nest: a Hercule Poirot Short Story (Hercule Poirot, #SS-29) 3.70 avg rating — 1,498 ratings
6.
And Then There Were None
And Then There Were None 4.28 avg rating — 1,544,118 ratings
7.
Airport
Airport really liked it 4.00 avg rating — 41,459 ratings
8.
Police at the Funeral (Albert Campion Mystery, #4)
Police at the Funeral (Albert Campion Mystery, #4) 3.97 avg rating — 7,222 ratings
9.
The Cat Who Played Post Office (Cat Who..., #6)
The Cat Who Played Post Office (Cat Who..., #6) 4.03 avg rating — 10,111 ratings
10.
The Word is Murder (Hawthorne & Horowitz, #1)
The Word is Murder (Hawthorne & Horowitz, #1) 3.93 avg rating — 94,139 ratings
11.
The Sentence is Death (Hawthorne & Horowitz, #2)
The Sentence is Death (Hawthorne & Horowitz, #2) 3.98 avg rating — 52,443 ratings
12.
Fletch (Fletch, #1)
Fletch (Fletch, #1) 3.90 avg rating — 8,871 ratings
13.
The Honjin Murders (Detective Kosuke Kindaichi, #1)
The Honjin Murders (Detective Kosuke Kindaichi, #1) 3.64 avg rating — 20,941 ratings
14.
One of Us Is Lying (One of Us is Lying, #1)
One of Us Is Lying (One of Us is Lying, #1) 3.91 avg rating — 1,013,646 ratings
15.
Widow's Walk (Spenser, #29)
Widow's Walk (Spenser, #29) 3.88 avg rating — 6,599 ratings
16.
The Yiddish Policemen's Union
The Yiddish Policemen's Union 3.72 avg rating — 79,301 ratings