Very fun game, the auto sort spell kinda sucks though.
I thought of some improvements to it that could make it good.
First often you will have books in multiple stacks making you have to hunt through the stacks barely any better then just picking something to find so instead the auto sort could sort the books by all the columns that autosort together instead of individually
Second Putting things in the piles to autosort is a big sink of time you could be hunting books, there should be some way of getting books into the auto sort area efficiently.
heres a few that come to mind
the column(s) auto grab books so they are always full
have a robot that moves books for you to the sort area
some way to grab and release multiple books at the same time instead of individually (holding shift/control for multi select?)