The Tipping Point: The Noah Hunter Series: Book 1 - Paperback

Grave Choices: The Noah Hunter Series: Book 2 - Paperback

The Universal Book of Mathematics: From Abracadabra to Zeno's Paradoxes - Hardcover

The Complete Book of Spaceflight: From Apollo 1 to Zero Gravity - Hardcover

Gravity's Arc: The Story of Gravity from Aristotle to Einstein and Beyond - Hardcover

The Complete Book of Spaceflight: From Apollo 1 to Zero Gravity - Paperback