You can download some of my e-books from this page.
Status:
E-book nr 1: A mixed collection of puzzles with numbers. Some types have been published on this blog, others are unique brainteasers. Download this free e-book now!
E-book n2 2: Puzzles in Properties and Patterns is available at smashwords.com, barnes and noble and in your ibooks.
E-books about puzzles with numbers, about puzzles in the plane, and about puzzles with Logic are in preparation.
justpuzzles 
Very helpful