Of the two titles from Andrew Knowles Titled "The Old Testament Guide" & "The New Testament Guide" the Old Testament doesn't match the book titles in the library. it's called "The Bible Guide - Old Testament".
Looking into them, I was wondering whether the NT version shouldn't better be called "The Bible Guide - New Testament" since it says of both that they are the first edition of The Bible Guide, but the title pages give "The New Testament Guide"/"The Old Testament Guide" respectively. At any rate, they should be named consistently and put into a series (note that you can do both in your library)
That said, the Knowles book "The Bible Guide" combines the content of both books and is actually typed bible-commentary with the respective scripture index which is lacking in the two Logos Reader editions.