Book 30 is a soon to be released book called The Day She Died by S. M. Freedman. You can get your copy when it releases April 27th.
This book jumps around in time quite a bit, I had to re-listen to parts to give myself an appropriate timeline. The story kept me wondering and questioning so in that aspect I'd say a good thriller. The narrator is a bit unreliable though which by the end left me frustrated. All in all a quick interesting read.