Sabbath Mood Homeschool

This site is my favorite place to find books about nature and science. Many of the book recommendations are out of print and hard to find, but I have found many on Ebay and archive.org. It is worth searching for.

Read-Aloud Revival

Sarah Mackenzie has a gift for picking wonderful books. Most of her choices are family read-alouds, but she has recently been adding genres like picture book biographies and math.

Libraries of Hope

This is the most extensive list of high-quality books I have found. The lists contains books that are in print as well as books that can be read for free at archive.org

Living Books Library

These ladies know books. They own a private library with only the highest quality literature. They post a list of their top picks in many categories.

Give Your Child the World

This book focuses on the importance of reading books about different cultures, and gives a very extensive list of books from all over the world, organized by complexity and country.