Jim Corrigan

Few species are as smart and playful as dolphins. These speedsters of the sea live in social groups. They have taught us many useful lessons about life in the ocean. With natural sonar, they can swim and hunt while blindfolded. Scientists study dolphins to learn more about intelligence in animals and in humans.

Spiders may be creepy, but they know amazing tricks. Some species have learned to fly. Others like to hangout underwater. Spider silk is strong and flexible. Spiders use it for more than just webs. Scientists keep trying to mimic spider silk. Once they succeed, people will find many awesome uses.

Sharks are perfect predators. These toothy fish have super senses for finding prey. We fear sharks but we also learn from them. The study of shark skin has led to many new inventions. Some species can even glow in the dark. New undersea drones swim like sharks. More discoveries await in the awesome world of sharks.

No other conflict in history matches the sheer magnitude of World War II. Aggressive dictators employed their military forces throughout the globe, forcing peaceful nations to fight back with troops and tanks. Deadly submarines scoured the world's oceans for enemy ships. In the sky, bombers and fighter planes tangled for supremacy. Meanwhile, scientists raced to develop new weapons and technology. The conflict raged for six years, affecting nearly...

When a contagious, deadly virus appears, Doc Dee and Invisible Six must find its source. The mission takes them into the Rift, a lawless section of the Amazon rain forest. But bandits and wild animals are the least of I-6's worries when the true enemy is invisible, widespread, and can't be beat by typical combat. Can Doc Dee and I-6 locate patient zero and stop a pandemic from happening? Aligned to Common Core Standards and correlated to state standards....

Fighter pilots are performing routine landings on a US aircraft carrier when the impossible happens: the massive ship sinks in the South Pacific. Athena and Invisible Six are quickly, deployed to the site to learn what happened and who is responsible. But the enemy is clever and soon makes I-6 look like the bad guy. Can Athena and I-6 unmask the enemy before another deadly attack occurs?

Special operative Shade is working out of the US embassy in Tek City, Tekistan, when fighting erupts between rebel and Tek government troops. The Americans are, trapped in this rebellion, unless Invisible Six can escort them to safety. But, the Tek government wants to take the American civilians as bargaining chips. Can Shade and I-6 help the civilians escape from Chaos City? Aligned to Common Core Standards and correlated to state standards. Claw...

Six secret operatives are the military's top experts in covert ops and rescue missions. But this elite special force doesn't exist-at least not in the public eye. No one knows where they come from or to where they return. The group gathers for the most dangerous, most difficult, most important missions and often operate in extreme conditions. They are known only by their code name: Invisible Six. Aligned to Common Core standards and correlated to...