Wow! What an amazing and fascinating book!  It answers an assortment of questions from how night vision goggles work to how space soliets work.  The font in the book is large and easy to read, so readers can move through the different topics quickly.  This book holds the readers attention.

The pictures are colorful and great examples of each topic.

The book has a nice glossary of words that might be new to young readers.  This is a fun book for readers of all ages.