Dan Green

Profiles the presidents of the United States, from George Washington to Barack Obama, and includes facts and trivia about each president, including major achievements and personality quirks.

The Rock and Gem Book is packed full of photos of natural wonders, including rocks, minerals, gems, shells and fossils. This children's encyclopedia displays more than 1,200 full-color specimens, from sapphires and rubies to silver and pearl, revealing the unique qualities of each material and how it is used in industry, architecture, art and science. Including precious metals, rare fossils, tiny gemstones and giant shells, the Rock and Gem Book gives...

"Get to know the universe on a different scale entirely and meet the characters that hold it all together! This book is a proton-tastic particle parade that takes your physical knowledge to a whole new level of quarks, qubits, and quantum weirdness."--P. [4] of cover.

Introduces weather-related topics, such as hurricanes, atmosphere, droughts, and more.

Imagine the oceans as an underwater world with a crew of quirky characters lurking in the depths. This book is your essential guide to the mysterious guys who are waiting to make a splash.

Introduces astronomy and the things it studies through profiles in which the Solar System, the planets, stars, and the Milky Way galaxy introduce themselves.

Profiles a variety of dinosaurs, including the iguanodon, parasaurolophus, and tyrannosaurus rex.

Presents mathematical concepts using lively descriptions and cartoon illustrations personifying each concept.

A comprehensive guide to the fifty U.S. states includes fun facts about each state, including their mottos, state birds, flags, and state flowers.

Uses cartoon-style characters to explain the concepts behind everyday technology, discussing gears, televisions, ceramics, microchips, wireless communication, and generators.