Nabaril: Immersion (The Nabaril Series, #1)

Archaeologist Megan Forest never thought that a routine jeep ride in the Arizona desert to look for petroglyphs would slip her into a time portal that land her a thousand years into the future.

Discovered by a Scholar who was also scouring the desert for information about the past, she finds she didn't drop into an advanced society, she discovers she now lives in a feudal time where knowledge is limited to guilds run by men and women only have one of two functions in this time: procreation ...