Good morning Paul,
The workbook for The Agile PrepCast has been discontinued when we switched over to our new Learning Management System in 2018. Everything that used to be in the workbook is now part of the LMS. For example, the module and lesson directory is accessible via Lesson L00.10, the Topic Index is now in L00.11, the Errata is in Appendix A, and so on. In this way, you have everything right there in the LMS and you don't need to reference a separate document any longer. And -- most importantly -- whenever we make an update then you don't have to download the updated PDF document. Instead, the new content "just appear" in the LMS.
And regarding your question on the flashcards: I'm personally not aware of any, and we currently don't have any plans to create them in the short term. In the long term we want to include a flashcards component into the LMS, but development takes time... even WITH agile development approaches...
Until Next Time,
Cornelius Fichtner, PMP, CSM
President, OSP International LLC