DISCLAIMER : some of these aren’t necessarily yandere, some are just possessive and/or obsessive. a lot of these books are psychological as well, but i think that’s a given, so just read with your own discretion.
if you have any book suggestions feel free to comment them down below!!
SECOND LIST LINK :
https://www.mangago.me/home/mangalist/2767519/ 
Messages
I saw the first one and I was like I trust you(▰˘◡˘▰)
haha you’ve got good taste (づ￣ ³￣)づ