This has become my go to commentary for a complete Bible study. I am very happy to have bought the 60 volumes on Logos. Logos has the 60-volume set (11,148 pages), someone mentioned buying the e-sword version to save money, but that platform has the 5-volume set (1088 pages). This is not a valid comparison, buy from Logos if you want the complete commentary and not a summary. I have both and use them for different purposes. There is also a Volume 6 Complete Index to the 5-volume set which can be used with this 60-volume set by looking up the Scripture references in with each topical description to search for a subject. I like to buy used copies of the paper indexes of these large volume electronic book sets to flip through. The index volume is not normally available in the eBook versions because the software makes an index unnecessary. My brain still likes to flip through paper indexes.