Easy Book about Einstein Theory of Relativity

[tinkerbells]

Hi
I remember reading some time ago about a book which explains Einstein's Theory of Relativity so that even those non-scientists of us can understand! Has anyone read a book which has made it all clear?! My teenage son is desperate to understand it and if only I could remember the name of this book which was meant to be fantastic, leaving readers with a "Wow! NOW I understand it!" feeling. Thanks everyone.

[mandimoo]

you may mean "a short history of nearly everything" by bill bryson. fantastic and mind boggling book!