Based on the book-list from /r/Buddhism the aim is to explore the fundamentals of Buddhism then branch out into the various traditions to get a better overall understanding of Buddhist practice. 

As the book-list says, trying to read all of the books on the list is a waste of time and would take an insane amount of time. The idea is to read something from each main category - which is what the prompts are based on. Feel free to also add things that are not on the book-list but fit the prompts.