Tác giả: Susan K. Mitchell

The world’s best spies cannot complete secret missions and do their jobs well without support from great spy agencies. So who do these spies work for? Many countries have spy agencies. Some of them h …

You see an airplane streaking through the sky. Is it a normal airplane flying vacationers to Florida? Or could it be a spy plane piloted by a robot taking pictures of you? As technology has advanced, …

Can flashing lights send out a secret message? Did a famous spy use sketches of butterflies to hide messages? Can a digital photo hide a secret code? For centuries, spies have used many different way …

Imagine going on dangerous missions like James Bond? Well, real-life spies risk their lives everyday. They will do almost anything to get the job done, but not all spies are heroes. Double agents wil …

Did a family of four, including a six-year-old boy, spy on the U.S. military at Pearl Harbor during World War II? Is it possible that pigeons and mice could be used as spies? Some of the most famous …

What type of mouse plays football? A field mouse. This book is filled with fun jokes, limericks, tongue twisters, and knock-knock jokes that will make readers squeal in delight. They’ll read fascinat …

Can you hide a spy camera in a pen or behind a shirt button? Spies need hidden cameras for secret missions. Need to pass along a secret message? A spy might use invisible ink. Spies could not do thei …

Armored skin, bony plates, and shells are key defenses animals employ to survive in their natural surroundings. By examining the many forms animal armor can take, readers will have the opportunity to …

Many mammals, reptiles, fish, and amphibians produce chemicals in their bodies in order to ward off predators. Some manufacture poisons or smelly or painful substances in their own bodies. Others acq …

Animals are experts when it comes to playing hide-and-seek. Using camouflage, prey and predators alike employ this crucial tactic to defend themselves and ensure their survival. Enhanced with vibrant …

Around the world, there are creatures that avoid being eaten because of their ability to mimic. If an insect, snake, or other creature looks like an animal that is poisonous or tastes bad, the predat …

Animals have evolved a wide range of defenses to keep them safe from other animals that want to eat them. This volume explores the many defenses animals employ to protect themselves, including porcup …

Animals have many different ways to protect themselves from their enemies. Only a few have the amazing ability to regrow body parts that have been bitten or pulled off by predators. It’s called regen …