Water Pollution (True Books: Environment)
by Rhonda Lucas Donald
Children's Press (CT); Published: 2001-09; Library Binding; Book
Price in other shops: $25.00

---

Acadia National Park (True Books: National Parks)
by Wende Fazio
Children's Press; Published: 1998-09; Library Binding; Book
Best price: $15.72
Price in other shops: $25.00

---

Eco-Mania Mazes (Dover Little Activity Books)
by Jessica Mazurkiewicz
Dover Publications; Published: 2010-03-18; Paperback; Book
Best price: $0.45
Price in other shops: $1.50

---

Invisible Endangered Animals Magic Picture Book
by Pat Stewart
Dover Publications; Published: 2001-11-16; Paperback; Book
Best price: $0.71
Price in other shops: $1.50

---

Howling Hurricanes (Awesome Forces of Nature)
by Richard Spilsbury
Heinemann Library Paperbacks; Published: 2005-01-30; Paperback; Book
Best price: $17.95

---

The Wildlife Detectives: How Forensic Scientists Fight Crimes Against Nature (Scientists in the Field Series)
by Donna M. Jackson
Houghton Mifflin Books for Children; Published: 2000-04-24; Hardcover; Book
Best price: $4.94
Price in other shops: $17.00

---

Wild Lives: A History of People & Animals of the Bronx Zoo
by Kathleen Weidner Zoehfeld
Knopf Books for Young Readers; Published: 2006-03-14; Hardcover; Book
Best price: $0.01
Price in other shops: $18.95

---

And Then There Was One: The Mysteries of Extinction
by Margery Facklam
Sierra Club Books; Published: 1990-05; Hardcover; Book
Price in other shops: $15.95

---

Rachel: The Story of Rachel Carson
by Amy Ehrlich
Harcourt Children's Books; Published: 2003-03-01; Hardcover; Book
Best price: $5.83
Price in other shops: $17.00

---

A Whale of a Time!: Junior Explorer SeriesBook 4 (Jeff Corwin)
by Jeff Corwin
Puffin; Published: 2010-10-14; Paperback; Book
Best price: $4.99