My Dad had an accident, and I'm looking for a device of some kind that would hold a book in front of him so that he might read it without having to hold the book, and at the right angle for his laid-back position. Can anyone suggest anything?

Sorry to hear your dad was hurt.
I did a quick search and found this link:

http://www.bestbookstand.com/?...7im9QCFciCfgodaQUAhA

Maybe they have something that will help.
Good luck

How about Audible? That is if his book is available in that format. Sometimes it is nice to have a book read to you. It might help him relax too.

Prism glasses. Never tried them myself, but have heard that they work for others.

A Kindle would likely help. Very thin, very light, backlighted, and variable text size. You could likely find a tablet holder that'll hold it over the bed while he is laying down.