Are you looking for ways to effectively integrate—and assess—science and literacy learning? Try having your students create their own books! The Integrated Science Literacy Enactments (ISLE) approach to teaching and learning science is one way to develop students’ science understandings while simultaneously enhancing their communication skills. The ISLE approach engages young children in science through hands-on explorations and numerous literacy-oriented experiences. Each unit culminates in the writing and illustrating of an information book on a topic of students’ own choice. The book serves as a tool to assess student understandings developed throughout the unit and is the focus of this chapter.