From publisher blurb:
Brand New Character Options for 5th Edition
Binding the 25 PDF articles released by TBM Games in 2021 into a single volume, Archivist's Bounty brings more than 20 new subclasses to world's most popular RPG, ranging from exiled noble barbarians to adaptive wizards who can deconstruct magic at its most fundamental principles, along with two ancient artifacts, a selection of character feats, chronomantic spells, and monsters for underwater adventuring!
This supplement includes:
21 subclasses for all of the core Fifth Edition classes
A new background for building characters with fey origins
Feats to enhance existing characters
Spells to add new variety to spellcasting characters
Two new artifacts, the Body of the Armored Tyrant and the *Death Shroud of the First Paladin
3 new aquatic monsters