This 88 page guidebook painstakingly describes the 44 deities and religions of Tellene. From the Eternal Lantern to the Rotlord, Mythos of the Divine and Worldly describes each deity’s priesthood including holy symbols, weapons, armor & raiment permitted, extra powers and spells, ability restrictions, holy days, advancement, heirarchy and chrch politic and more.
This text also includes descriptions of Tellene’s major secret organizations, details on the 13 major languages (including 11 rune-sets), constellations, astronomical marvels and an all-inclusive eight page index.
Mythos was originally released as one of two books included in the Kingdoms of Kalamar setting. Specific game mechanics utilize the AD&D second edition ruleset but are not so overwhelmingly entwined as to prevent use with other systems.
Note that this is a scanned PDF of the original printed book and thus does not support text extraction. However, unlike many other PDFs of books of this vintage, the text is not washed out for care has been taken to provide the best user experience possible given the unavailablity of the original digital document.