I just put it face down on the pages I’m reading.
When I was at uni and didnt have room for a bookcase or a side-table by my bed, I piled the books up by my bed and used it as a table. Mentioned this to some people on my course and one girl I didn’t even know FLIPPED THE FUCK OUT about it and yelled at me for disrespecting books. (Fuck knows how she’d have reacted if she knew that I bent page corners and used highlighters to highlight useful quotes for essays.)
happy to disrespect books if it meant getting a First tho tbf tbh