There were a number of books that were considered Scriptural by various Church figures in the first centuries of Christianity, and it often broke down on regional grounds. The Four Gospels, Acts, and the 13 letters of Paul were basically accepted everywhere by everyone (at least everyone orthodox) by the middle of the 2nd century. But all the other books were disputed in some form or other, and other books were also included in some regions’ canons. Here are some examples:
Irenaeus in the latter half of the 2nd century accepted the Shepherd of Hermes as Scripture.
The Muratorian Canon, which dates to the 2nd half of the 2nd century, included the Wisdom of Solomon and the Revelation of Peter in the canon (although it acknowledged that the Revelation of Peter was not accepted in some Churches). It explicitly rejected the Shepherd of Hermes as scriptural.
Tertullian (early 3rd century) accepted the Shepherd of Hermes (until he became a Montanist).
Clement of Alexandria (early 3rd century) accepted Shepherd of Hermes, 1 Clement, Epistle of Barnabas, Revelation of Peter, and the Didache.
Origen (mid-3rd century), also of Alexandria, accepted 1 Clement, Epistle of Barnabas, and Shepherd of Hermes but acknowledged they were disputed.
Eusebius of Caesarea in the early 4th century makes the following distinctions:
“Undisputed”
- Four Gospels and Acts
- Epistles of Paul (including Hebrews)
- 1 John
- 1 Peter
- Revelation of John (by some)
“Disputed”
- James
- Jude
- 2 Peter
- 2 & 3 John
“Inauthentic”
- Acts of Paul
- Shepherd of Hermas
- Revelation of Peter
- Epistle of Barnabas
- Didache
- Revelation of John (by some)
- “other” Gospels: to the Hebrews, Peter, Thomas, Matthias
By the end of the 4th century, there was general agreement on the 27-book canon we have today.
So it looks like the following books were accepted at least by some prominent figures or churches at one time or another but were eventually rejected:
Shepherd of Hermas
1 Clement
Wisdom of Solomon
Revelation of Peter
Epistle of Barnabas
Didache
The fact that Eusebeus explicitly mentions some other “Gospels” (to the Hebrews, Peter, Thomas, Matthias) as being inauthentic probably means that some people or groups accepted them, but likely not very many since we don’t have any other record of their support.