Complex nonfiction can be tough for even the most advanced readers, which is why it's important to provide both engaging and appropriately leveled texts as readers begin to progress towards more complicated subjects and more advanced books. The selections in this nonfiction book list are curated to be on-level for Guided Reading Level W, offering readers the appropriate mix of fluency and challenge. Use them to teach readers how to employ a wide range of content knowledge and explore topics such as the human condition and nuanced social issues.