I voted purely on library availability but it turns out that I have read or would be willing to try all of the available ones anyway.
It is too bad
Rivers of London/Midnight Riot has been missed a couple times. It is an excellent book and series. I just finished books 2 and 3 in less than a week.
It would be nice to have it in a run-off at a minimum. Of course, if it stays in second place that may be ok too; I think it would have a decent chance in January.