An excellent gauge for how good a book is can be found in how many times you catch yourself thinking back on it even after some time has passed. Through this, my favorite this entire year is The Diary of a Young Girl (Anne Frank's diary). Without a doubt one of the best books I have ever read, just through how supremely human it is.
Other books are:
-The Code Breaker by Walter Isaacson
-Sapiens by Yuval Yuval Noah Harari
-21 Lessons for the 21st Century
-Surely You're Joking, Mr. Feyn
man!: Adventures of a Curious Character by Richard Feynman
-Why Nations Fail by Daron Acemoglu and James A. Robinson
Other books are:
-The Code Breaker by Walter Isaacson
-Sapiens by Yuval Yuval Noah Harari
-21 Lessons for the 21st Century
-Surely You're Joking, Mr. Feyn man!: Adventures of a Curious Character by Richard Feynman
-Why Nations Fail by Daron Acemoglu and James A. Robinson
-Permanent Record by Edward Snowden