Has anyone here heart of "incremental reading"?

The concept of breaking a book into "chunks" and then individually scheduling those chunks to be read via an spaced repetition algorithm. The thing is that incremental reading is much harder to do with physical books. And you would have to either calculate the next schedule(hard) or use a simple leinter box system(loss of efficiency).

I wonder if normal reading is this "pristine" reading and incremental reading being the "messy" reading.