"Spirits of Ash and Foam" was interesting, adventurous, and obscure. However, I was not intrigued by the book. There were too many things happening at one time. I got lost in the many different chapters, which made the book confusing. One chapter would be about Rain and her friends, the next about Callahan and detectives. I suggest "Spirits of Ash and Foam" to readers who love adventure and mystical fantasies, but not daunted by complicated story lines.