Reading list: Homeschool
Preschool and Kindergarten Homeschool Curriculum
Collection of secular books for home school and home educators. Grade appropriate for U.S. Preschool and Kindergarten
Typically covering U.S. grade level PreK-K ages 3-6
Biblically based curriculum has a separate list- (Preschool and Kindergarten biblically based)
You can view the entire collection of Homeschool books on the collection page:
https://openlibrary.org/collections/HomeSchool