Book excerpt: A Step 3 Step into Reading Biography Reader about Theodore Roosevelt—America's 26th President—and his efforts to protect our environment and establish national parks. Roosevelt battled asthma all his life, and the list of things he shouldn’t do was long. But when people told him “you can’t,” he set about proving them wrong. This book focuses on his inexhaustible enthusiasm and his commitment to preserving America’s natural resources. Step 3 Readers feature engaging characters in easy-to-follow plots about popular topics. These books are for children who are ready to read on their own.