This may be one of my favorite Wings of Fire books, partly because it's well done and partly because it is so full of Easter eggs for long-time fans. There are some wonderful moments where the characters in this book glimpse or interact with the characters in previous books (especially the first five books of the series).

I admit, I was a bit worried about that title; there are a lot of dragons I like in this world. The title of Dragonslayer is given to a scavenger (human) who was present when the Sandwing queen died, the event that started the war that brought us The Dragonets of Destiny (the main characters of the first five books). That's the event that starts this book off, and we get a look at how this event and the war impact the various human civilizations across the continent. As in with other books in the series, we see diversity in cultures and both the best and worst of characters (this time primarily humans). It's wonderful to see how the characters and events are even more closely connected and intertwined than we may have realized before.

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.