Just finished Volume 1, and i’m hooked. Trying to budget how much the whole series will set me back!
It appears there’ll be 15 volumes total.
Currently the first 13 or 14 are out. (I’d be able to tell you for sure, but I’ve lent the last two or three to a friend, and from the length of time she’s held onto them I think she may be trying to breed them or something.)