I have a particular fondness for the independently-published Star Wars philosophy book. People are all over the board in how they see the Force and Star Wars and these books reflect that.
Jedi Manual Basics: Introduction to Jedi Knighthood by Matthew Vossler came across to me, from its description, as a book written for kids (another fondness of mine). But it’s actually a workbook for those wishing to study Jediism as a religion or personal philosophy.
Jediism has been gaining ground as a religion in recent years. This book lets you walk through the basic precepts and examine your own understanding of the Force through a series of studies and writing assignments.
I would have liked to see a bit more actual background over assignments. And the use of URL’s as reading assignments could be problematic as sites go down and change. As a result, its usefulness in the long term is doubtful. But if you’re at all interested in Jediism, this would be an interesting way to explore it further.