Discover the top secret, spy-tacular world of espionage with this complete spy kit. Assemble a double-security lock with a combination code and key to hide your

The National Security Agency is the world’s most powerful, most far-reaching espionage. Now with a new afterword describing the security lapses that preceded

The colourful rocks you explore with this kit will open up the world of earth science and geology! Kick-start your very own rock collection with the 36 stones.

A USA TODAY BESTSELLER! "A powerful debut that proves the threads that interweave our lives can withstand time and any tide, and bind our hearts forever."—Sus

Get the stone-cold facts on rocks! Packed with 29 unique rocks, gems, and minerals, this is the perfect kit to start or expand a rock collection. Build a color-