I know you have this problem too! The books are everywhere and new ones seem to come all the time. Imagine my excitement when the UPS man comes with a brown box only to find that it is yet again more medical books!
Thankfully, our program does include money for the purchase of books so they don't actually hit my bottom line. That is unless DrH forgets to submit the receipts in which case he hears my screams from the other room. Those books are not cheap and the purchase of them has to be carefully orchestrated so there is time to submit the receipts and get the reimbursement check before other bills come due.
I'm complaining about the books because I should be cleaning the house. That is what I was going to spend the day doing (again). But I ran across four of those books sitting on top of a horizontal surface I try to keep clear at all times! His books always find a way to that spot, or on the floor next to the couch where he left it before going to bed. I have even found them under the couch. Maybe one of the kids put them there. Where I never find them are on the bookshelf! OK, that's not entirely true. The ones on the shelf are the ones that I put there that he hasn't taken out yet.
On our list of things to have when that "day" comes is a library. We already have the books, boxes and boxes of them, just not enough room to keep them all on shelves.