The Children's Literature Comprehensive Database is a fantastic place to search for children's literature by reading level, category, or genre. UVic Libraries doesn't have every book included in the database, but we do have a lot. Once you find some books in CLCD, then search by title in the UVic catalogue.
Storybooks Canada is "a free open educational resource that promotes literacy and language learning in homes, schools and communities."
Indigenous Storybooks is an open educational resource making levelled-texts available in Indigenous languages.