Here is a list of books that people like that don't belong in a series (I think. tell me if I'm wrong)
1.1984
2.3 Reasons Why
3.Going Too Far
4.Living Dead Girl
5.Cracked Up To Be
6.Fire
7.Da Vinci Code
8.Willow
9.A Journey to the Center of the Earth
10.Michel Strogoff
11.The Book Theif
12.First Love
13.Mister B Gone
14.Lovecraft
15.The Tales of the Otori
16.A Kiss in Time
17.It's Kind of a Funny Story
18.Fire Study
19.Once Upon a Crime
20.Jellicoe
21.Poison Study
22.Memoirs of a Teenage Amnesiac
23.My Name is Chloe
24.Malice
25.Brooklyn Nine
26.Fruits Basket
27.Cherub
28.Pendragon
29.Say Good Night Gracie
30.The Night I Disappeared (a companion to Say Goodnight Gracie)