This is one of the books that influenced me as a kid but that I had forgotten about since. I only re-discovered it because I went through some old books of mine on a trip back home.
Visual Thinking by Marco Meirovitz and Paul I. Jacobs introduces mathematical concepts and games like polyominos, tiling and topology in a way that was simple enough for a 12 year old boy without special mathematical aptitude to be captivated. It’s the sort of diversion that would be easy to dismiss if it didn’t sometimes, when applied by people smarter than me, result in real insights, as exemplified by the work of Roger Penrose, Paul J. Steinhardt, John Horton Conway and Stephen Wolfram.
Nehaveigur 