Many of the books are ones the trainers used when they were in the classroom. Like lots of folks who enjoy children's literature they are constantly adding to their collection. The trainers also try to use books that are familiar to workshop participants. They select books that make connections between our families lives and the issues raised by the stories - connecting to themes and issues that are current and critical. Having the potential for academic use with adults is most important.
Multicultural representation is an important consideration.
To travel with as few books as possible, they select books with multiple purposes. Books are used every which way. I know this is vague, but it is also quite true. Reading books aloud often begin or end training segments as they might in any classoom.