This was something that was asked a couple of times in relation to my last post, (and has been asked lots more times in the past) and I figured it deserved its own post to answer.
The short answer is that the series is more than half done. The Alex Verus books that are out there right now are most of the ones that there ever will be. This isn’t an absolute 100% guarantee (since I haven’t planned everything out in that kind of detail) but I’m almost sure that Fated through Bound will outnumber the rest of the series. Call it ninety percent certain.
Nailing down an exact number is harder. I know what’s going to happen in Book #10, and I have vague plans for Book #11, but I don’t know exactly what’s going to happen beyond then. That said, I don’t think all the books ‘beyond then’ will add up to very many. Book #10 will leave the series in an unstable position, to the extent that it won’t really be possible to keep things going for all that long afterwards. If I had to make a guess, I’d say #13 will be the last, but I might be underestimating. We’ll see.
In any case, don’t expect the series to go on forever! I might be wrong on the exact numbers, but I’m pretty sure about the overall shape. So the total might be 12, or 14, but it’s not going to be 16 or 20. That’s the best guess I have at the moment.