Dona Herweck Rice 
La interdependencia de los seres vivos (Interdependence of Living Things) [PDF ebook] 

All living things need one another to survive. Working together keeps the circle of life going. Learn about symbiosis with this Spanish science reader that features easy-to-read text and introduces students to important scientific concepts and topics. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.