From publisher blurb:
Breath of Life: The Archivist is our fourth product in the Breath of Life product line. It is a reimagining of the spellcasting scholar class from the 3.5 edition of a very popular table-top roleplaying system. Like the previous entries in this series, it is not a copy-paste update. No, this is a whole new class with new mechanics and systems to make it dynamic and fun to use along side other classes available in Pathfinder 1st edition. The book has the following:
An all-new, 1-20 level class focused on leveraging knowledge and balancing the insanity borne from knowing too much, you a plethora of talents to tailor your knowledge-based abilities for your archivist.
Six archetype options to further tailor your archivist to your playstyle.
Six archetypes to bring magical mastery and horror themes and mechanics and abilities to other classes like the abjurant champion archetype for the magus.
Five other class options to add horror and magic options to existing classes like the monsters patron for the witch and legendary witch.
Seven new feats.
47 new spells to crush your foes, feats to further enhance your skills,
New spellbook options to enhance and protect your spell repositories.
New magic items meant to enhance your magic abilities
New creatures and templates
Optional rules to make Knowledge and Lore more robust
An example NPC that uses the class mechanics you can use as a guide or as an NPC to interact with your players.