Right now my doctoral research involves poring over about 20 MASSIVE volumes of archival records. I'm reading through all the existing archives of every county in England searching for any references to musicians. Yeah, it gets old.
So to rest my brain from the above rubbish, I read novels at night. Have you read The Pillars of the Earth? Probably. It's been huge forever but I must shamefully admit that I usually shy away from 1,000+ page novels. Such a time commitment! It's an epic story revolving around the building of a Cathedral in 12th century England. Love it!