Indie YA fantasy fiction: Spera
I bought this book on a whim at Wondercon last year, and am very glad the saleperson convinced me that two volumes were a better deal than one. A series of adventure stories with two princesses (one of whom is a pretty great warrior), fire spirit and eventually a pirate cat, each chapter is illustrated by someone different. Besides making every turn of the page a new adventure of its own, this caused me to continue looking at the characters in literally a new way. It's almost like you can really see them changing because of their journey.
Volume 2 already sits by my bedside.