I purchased this book for My 10 year old Son who is in 5th Grade. He had to write a report on a Non Fiction Book. He is a fast reader, and still prefers to read short books when needed for assignments. He was able to read the book in one day, write report next. Each chapter is a subject that has fascinating information. Part of his prompt for Report was to identify things he knew and things he did not. The did know portion was alot he learned about. He was excited and shared almost the whole book to me as he read. :) Made for and easy fun read for his report. Id recommend book for any young reader or eve a book to keep close by for a quick read on any chapter. Enjoyable for All. Written for kids and families!