I am so glad it ties in with Tigerheart's Shadow. It is a really good book, but I wished that it had continued a bit more what it was like after (spoiler) Tigerheart became Tigerstar (in name, not personality)
I'm still not 100% sure how I got a copy of this book at the Newton library before everyone else.
Spoiler alert!!!-Rowanstar gets replaced by a rouge and is staying in Thunderclan with tigerheart(his new deputy) and tawnypelt (his mate).