A Cask-Aged Blade is the third and final book in the grimdark fantasy series Rainfallen, written by Benjamin Aeveryn. A novel which picks directly after the ending of Secret of the Thistle, with a Galahad that claims revenge for what the Unholy King did to his town, and which takes us to paths that definitely we didn't expect, but which marks the ending to Galahad's story.

While the initial focus of the series is more the mythical world that appears in this post-apocalyptical context, in comparison A Cask-Aged Blade puts more the focus on the system that emerged after it, and how the corruption and greed have only brought suffering to the lower classes. Seeking for revenge against the Unholy King, Galahad and Fey will travel to New London, but soon will discover that the problem is rooted much deeper than in a single person, proving that the system is rotten to the core.
However, there is still space for more mythical creatures, as New London will be threatened by a dragon; it's in those moments that Fey will assume the role of leader to help those unfavoured, while Galahad plays as the hero in a subplot that might be inspired by the myth of Saint George and the dragon.

I liked Galahad from the previous books, but the wide range of emotions that he shows during A Cask-Aged Blade are what made him one of my favourite characters at the end; idealism has a limit, and seeing Galahad experiencing depression because of what he perceives as his failure is heart-breaking. 
In comparison with the other books, he plays a more leading role, taking a great part of the spotlight, but still allowing Fey to get the space to shine; and we will even have some apparitions of great characters such as Kade Blackcap.

Definitely, I cannot say this is what I expected A Cask-Aged Blade to be, as Aeveryn took it in a different way that what I imagined; but at the same time, this was the appropriate ending for Galahad and the Round Table. The Rainfallen series is simply excellent, and if you like Arthurian myths, complex characters and a post-apolyptic world as much as me, I totally recommend you to pick it.
And who knows, maybe the end is just the beginning of something new.