Not the best in English, but in sentence "...its edless uncertainty inspire you with..." Ain't the "endless" demanding use of "inspires" ? (page 2).
In sentence: by photographic, optical, electronic, or other media or methods of storage and retrival, is prohibited., Should it be retrieval? (page 2)
Pregenerated => Pre generated (page 3)
Not sure, but "...Each player plays their adventurer consistent..." could be written "them". (page 5).
"Rune affinities is always..." Should be "are". (Page 7, Everyone Has Magic).
Not sure about this, but "By advancing within a cult, an adventurer gains magical power and important temporal resources". Should that be "gain"? (page 8, Cults).
"them when captured, and avenges them when injured." Is the comma needed?
"...civilization they defend, and is rarely at home in the civilized world", Is comma needed? (Page 11, Heroes & Heroquesting)
Should "openended" be written "open-ended"? (Page 23, Getting Started. )
"Groundsmen". Should that be "groundmen"? (Page 26, Sartar)
"Dragonkind", should that be "Dragonkin"? (Page 26, Specific Passions Described)
"The most common of these groups is the clan.". Should that be "The clan is most common of these groups". (Page 28, Clans).
"...and longterm marriages intended...", Should that be "long-term"? (page 33, Marriage).
"In 1620, Farnan was one of the volunteer", Should that be "volunteers". (page 46, Vasana's Saga).
"selfdefined", Should that be "self defined", (Page 50 , Harmony/Disorder runes. )
"Many wander from city to city, supporting themselves through teaching", Should that be "Wanders"? (page 70, Philosopher).