Helen Greathead (Author) Helen Greathead is a highly experienced creator, editor, project manager and writer of successful non-fiction titles and series. She spent 14 years at Scholastic Children's Books where she commissioned series, including Horrible Histories. She began a freelance career in 2003, and titles she has written include the Now You Know series (Scholastic) and the Design and Make series (Watts).Kyle Beckett (Illustrator) In the third grade, Kyle sold a drawing of a bluebird wearing sunglasses at lunch. His payment? One chocolate chip cookie! From that first commission on, he knew he wanted to be an illustrator. It wasn't until much later (he had almost finished eating his cookie) that he decided to be a writer, too. Growing up in Rockford, Illinois, he started putting drawings and words on every piece of paper he could find, and maybe even a wall or two. It's been a long time since third grade, but not much has changed about Kyle. He still writes and draws stories for anyone who likes the quirky, the strange and the not-so-serious.

• 1: What’s Solid and What’s Not 41: Sugar in the Blood 61: Poo is Important 81: Poo Down the Loo 101: What to Do with Animal Poo 121: Pumas Rule! 141: Where Does Human Food Waste Go? 161: More Plastic than Fish 181: Plastic not Fantastic 201: Plastic Solutions 221: Smelly Old Shoes 241: Mighty Metals 261: Solids in Space 281: Glossary 301: Further information 311: Index

Helen Greathead (Author) Helen Greathead is a highly experienced creator, editor, project manager and writer of successful non-fiction titles and series. She spent 14 years at Scholastic Children's Books where she commissioned series, including Horrible Histories. She began a freelance career in 2003, and titles she has written include the Now You Know series (Scholastic) and the Design and Make series (Watts).Kyle Beckett (Illustrator) In the third grade, Kyle sold a drawing of a bluebird wearing sunglasses at lunch. His payment? One chocolate chip cookie! From that first commission on, he knew he wanted to be an illustrator. It wasn't until much later (he had almost finished eating his cookie) that he decided to be a writer, too. Growing up in Rockford, Illinois, he started putting drawings and words on every piece of paper he could find, and maybe even a wall or two. It's been a long time since third grade, but not much has changed about Kyle. He still writes and draws stories for anyone who likes the quirky, the strange and the not-so-serious.

• 1: What’s Solid and What’s Not 41: Sugar in the Blood 61: Poo is Important 81: Poo Down the Loo 101: What to Do with Animal Poo 121: Pumas Rule! 141: Where Does Human Food Waste Go? 161: More Plastic than Fish 181: Plastic not Fantastic 201: Plastic Solutions 221: Smelly Old Shoes 241: Mighty Metals 261: Solids in Space 281: Glossary 301: Further information 311: Index