Reminds me, in a way, of the The Book of Kells, at Trinity College, Dublin.
What is the Book of Kells?
The Book of Kells (Trinity College Dublin MS 58) contains the four Gospels in Latin based on the Vulgate text which St Jerome completed in 384AD, intermixed with readings from the earlier Old Latin translation. The Gospel texts are prefaced by other texts, including “canon tables”, or concordances of Gospel passages common to two or more of the evangelists; summaries of the gospel narratives (Breves causae); and prefaces characterizing the evangelists (Argumenta).
The book is written on vellum (prepared calfskin) in a bold and expert version of the script known as “insular majuscule”. It contains 340 folios, now measuring approximately 330 x 255 mm; they were severely trimmed, and their edges gilded, in the course of rebinding in the 19th century.
https://www.tcd.ie/library/manuscripts/book-of-kells.php
Like the Book of Hours, the Book of Kells was a breviary, that is, a subset (brief version) of the Holy Scriptures intended for daily prayer and often including the gospels, the epistles, and various prayers, canticles, psalms, etc., from the OT. (I think the Kells included only the gospels, right?) Initially used because the entire bible was too expensive for a typical scholar, seminarian or monk to keep for his private uses, such books were often highly decorated and incredibly expensive when they were the official copy of a highly esteemed place.