Bookshelf
Below are some of the the books that have most influenced my cocktails:
Imbibe
A great history of cocktails and spirits while focusing on a legendary barman Jerry Thomas.
New York Cocktails
An creative collection of recipes from NYC bars!
Meehan's Bartender Manual
Exquisite pictures, very well curated drinks, and easy hacks to improve almost any drink.
3 Ingredient Cocktails:
While most of these cocktails were known to me, the way the author writes added made this a pleasure to read and experiment with.