"Traveling to another plane of existence tasted like cyan. It smelled like a stubbed toe. I detected notes of lighthouse, iambic pentameter, and general relativity."

This was an interesting and satisfying sequel/conclusion. The stakes are raised — right into another dimension — and Genie has to face the sacrifices necessary to save the multiverse. While also dealing with the adminstrative duties of being a guardian, the scheming politics of heaven, and the pressures of a new relationship.