Sapphire Blue' is the second book in Kerstin Gier's 'Ruby Red' trilogy, and it dives deeper into the time-traveling adventures of Gwen Shepherd. If you loved the first book's mix of historical intrigue and modern-day drama, this one cranks up the stakes. Gwen's still adjusting to her sudden ability to travel through time, and now she's caught in a web of secrets involving the mysterious Circle of Twelve. The chemistry between her and Gideon, the time-traveling heartthrob, gets even more complicated—think witty banter, stolen glances, and a few heart-stopping moments.
What really stands out is how the story blends fantasy with Gwen's relatable teenage struggles. She's not some perfect heroine; she's awkward, funny, and just trying to survive her chaotic new reality. The book also introduces more time periods, from lavish 18th-century balls to tense moments in World War II, making the world feel richer. By the end, you're left with way more questions than answers, especially about Gwen's true role in all this. I couldn't put it down—it's like a cozy mystery with a time-travel twist.