It’s going to tire out your hands to hold up an 850-page book for the time it takes to read an 850-page book. If you read in bed, it’s going to tire your arms out, trying to hold this giant tome over your head.

If you can't figure out how to read a large book in comfort that seems like a you problem. It's up to you what you do with (or rather, to) your books but don't ask me to applaud you for being clever.