In Paperback Fighter!, Laserbeam states that the Die-brarian is his 4th most-dangerous foe.
In Book, Line, and Sinker!, Laserbeam called Die-brarian his worst foe.
In the Die-brarian's second appearance in Book, Line, and Sinker!, Captain Laserbeam realizes that Papercut has fooled his boss into merely doing charity work and donating books to schools and libraries. Laserbeam is forced to freeze Phillip Fathom and drag him away to keep him from disrupting the Die-brarian's scheme.
The Die-Brarian's lair is known as the Card Catacombs and he uses his Terrible Tableau-ray to fight heroes.
- The Thrilling Adventure Hour in The Room Live (non-canonical)
- Paperback Fighter! (TAH #130)
- Book, Line, and Sinker! (TAH #134)
- A Ferry Fathom Christmas (TAH #147)
- Irrational Numbler (TAH #36)