I hope Bunny Drop Volume 4 gets back in stock soon. I ordered it almost a month and a half ago, but it's still on order.
My apologies, I don't usually frequent this forum and didn't see this comment until now. Please feel free to express concerns like this to our Customer Service department; they're a bit faster than I am.
Anyway, I checked with Accounting and they had the following to report:
We called Hachette [Yen Press' distributor], and they said that the reprint is running late, and they currently don't have an ETA for when it will be back in-stock.