Because of not understanding portions of a book purchased from Logos I posted a request for information in the forums Resource request: American church historian or Church of Christ adherent most likely to know. - Logos Forums. What I discovered was that the suggested resources are out of print but in sufficient demand to get premium prices. Examples:
- The Bible Only Makes Christians Only & the Only Christians by Thomas B. Warren for $ 50
- When Is an "Example" Binding? by Thomas B. Warren $ 63.79
At those prices, if Logos offers the books at a reasonable price, Logos including the software will be the cheapest way for coC adherents to get their books.