This is one of my favorite Wings of Fire books. I really enjoyed the opportunity to see inside Peril's head. She's not a bad dragon, but she's been manipulated and abused her entire life. It's legitimately hard for her to know how to make friends and make good choices. It's really nice to see her growing here!

Once again there are good friendship and life lessons (when to try to accomplish something yourself and when you need help) in this story.

My recommendation for reading order of the Wings of Fire (WoF) series:
WoF #1-5
WoF Legends - Darkstalker
WoF #6-14
WoF Legends - Dragonslayer (this could be read after book #5, but that would spoil a sweet surprise present in book #14)

The WoF books follow a five book plot arc (with each book covering the growth arc of one character). If book 1 doesn't work for you, consider starting with book 6 or 11 to get invested in the world. Each book adds to the complexity of culture and history in the world, so you may miss a little if you skip books, but the overall plot and story will work.