I do get "burnout." I'm one who voraciously reads through authors one at a time (if they are in series), or reads in a certain genre or something like that. I always have to have *something,* so when I hit those points, I usually focus on things like logic problems, number puzzles, or something else where my brain is engaged. I have to do stuff like that in order to 'relax' my brain before going to sleep, especially. It's either reading or brain puzzles. If a book is particularly intense and likely to seep into my dreams, I'll do puzzles afterwards to relax my brain. Too many puzzles though, and I dream of those instead
