YAY! I made it through my first month without buying any new books!!
Now, I by no means didn't have book acquisition. I got a ton of books from the Friends of the Library sale. For every hour I volunteered, I got a credit to use towards buying books. So no money left my pockets but books did enter my house. But this isn't about not acquiring books - it's about not PAYING for books. I am broke and on a budget and need to conserve my cash.
There is an exception. A couple of months ago when I thought I had a new job (long story) that would involve a long commute, I did rejoin Audible, and so I am paying for Audible again which I guess means I have in fact paid for books the last 3 months. Darn it! So April wasn't quite as perfect as I thought it was! And that almost means I underestimated the last 2 months' purchases too (I only just now downloaded all 3 books, which is why I didn't think of it before.)
So, I still have room to improve for May. I have now put my account on hold, which means I should be clear on this point for the next 3 months. But I am doing better!