I'll be honest, after Firestar's death, I was afraid things would be not as good. And of course, my favorite Warriors books will always have the "OG crew" in them (Firestar, Greystripe, Brackenfur, Sandstorm, Dustpelt, etc). I was so happy to see that I enjoy the series just as much as before still. I like Alderpaw's character, and I was happy to see a little more of the characters that are usually just floating around in the background (Molewhisker, Cherryfall). I hate Needlepaw, but I'm sure she's written this way on purpose, to make everyone like her and hate her at the same time and all.
I thought the plot is well done, and the quest to find Skyclan was interesting to read from beginning to end, with the addition of the rogues that took Skyclan over addictive to read. It was also interesting to get more of a peek into Shadowclan as well.
Overall a well-written part of the Warriors series and am looking forward to reading the next one.