Howl's moving castle is a fantastic book with a fantastic story but what really makes it unique are its characters. They're selfish, trapped in their own miseries and stubborn to a t but this makes their interactions amazing. I loved reading Howl and Sophie argue because they're such strongwilled people. 

I also quite like how every side character has their own story that preoccupies them;

such as Lettie and Martha's switch or the mystery of the missing men ( prince Justin and the royal wizard Benjamin Suliman).

It makes the world feel so lively and the final resolution to all these loose ends so satisfying. 

So, all in all, a great read. I also think it's enormously funny that Howl is canonically from Wales lmao.