Soldier Coloring Book: American Military from 1780 to Modern Times

Art Coloring Book: 101 Masterpieces from Da Vinci to Van Gogh

Caravaggio Coloring Book: Masterpieces from the Master

Modigliani Coloring Book: 8 Paintings from the Master

Barcelona Coloring Book: Color Barcelona's Beautiful Attractions

Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks

The Fascinating World of Graph Theory

Think Like a Maths Genius, Paperback

The Magic of Math: Solving for X and Figuring Out Why, Paperback