Note: These books are included in PDF format with the purchase of their respective commentary.
Handbooks (supplemental study notes) are a helpful addition to any study, however we found many people prefer a physical printed book, or purchase as a separate download.
More information on Handbooks here...
Workbooks and Notebooks are a helpful addition to any study. These contain additional information on a particular study. Commentary Workbooks contain key slides used in the presentations of the corresponding study, with plenty of area to write your own notes while you follow the study.
For more information: What is a Workbook?