Invaders in the Human Body (Microscopic and Hidden Life)

A human body is a habitat for millions of microorganisms.

Many of the cells in our body are not human but belong to tiny creatures that live in and on us. Find out what they are all up to, and whether they are useful for our health or not.

What we can easily see all around us is only a fraction of what is really there. The microscopic world in and on animals, plants, the ground we walk on, and even our own body is full of tiny things that are scary, mysterious, and amazingly strange.

Warren Singer is an accomplished children's book author with an interest in science and engineering. His aim is to encourage young readers to become as fascinated by science and technology as he is.