As someone that has yet To become an avid book fanatic, you're better off trying to pick books with fictional storylines that suit Your interest. If you're Just going to Read books to boost knowledge you'll get bored rather quickly as you're not used to reading a lot. You need to Be able to become immersed in reading First.
Maybe a few titles that could be interesting to you and not too thick are;
The ocean at the end of the land by neil gaiman
Paulo coelho - brida
Steelheart by brandon sanderson
Neverwhere by neil gaiman
The graveyard book by neil gaiman
The alchemyst by michael scott
I Just named a few that aren't too dense but Will easily have You immersed in them.
If you Just want information..
The Prince by Niccolo Machiavelli
Pioneers of psychology by Raymond Fencher
The Intention Experiment by Lynne McTaggart
Fire in the minds of Men by James billington
rulers of evil by F. Tupper saussy
Monita secreta
Book of the damned by Charles fort
Symbols, ***, and the stars by ernest busenbark