College Press has an old Bible study – textbook series they use to have on their website in a PDF download format, this is now in flip-book format and you can print but the print does not always line up with the original pages.

College Press https://collegepress.myshopify.com/

Free Resources
College Press Bible Study Textbook Series
http://fliphtml5.com/bookcase/mmhg

Bible Support .com for E-Sword has converted all of these to an e-Sword module you can download, this is a great peace of work and a wonderful way to get these and use them as a reference to your studies.

Download College Press Bible Study Textbook Series (59 vols) .1
http://www.biblesupport.com/e-sword-downloads/file/9953-college-press-bible-study-textbook-series-59-vols/

Also; you can do a Google search on:
“Bible Study Textbook Commentaries College Press”
this will bring up several results including:
http://www.onlytheword.org/?p=40
http://www.abarc.org/legacy/Bible%20Study%20Textbook%20Series/BSTS.htm