Have purchased this book on several occasions for boys as young as 8 to men. Great book for those who like to know how things "work" on a level where most can understand. The variety of information and illustrations are wonderful and I'm sure all who receive this book will enjoy it for years to come. I think it's a great gift for younger men as it will "grow" with them. Would even be good for us " curious thinking" females too.
I bought this book for my husband and he loved it! This book has amazing, easy to learn information on everything in it. My husband is the type of person who is always yearning to learn and this book was one of his favorite gifts he received for his birthday this past year. Great gift for inquiring minds!