“Sapphire Blue” is the second book in the “Precious Stone Trilogy” by Kerstin Gier, following the story of Gwen, a young time traveler who discovers her unique abilities and the mysteries surrounding her family.

In this installment, Gwen is still grappling with her newfound powers and the responsibilities that come with them. She must navigate the treacherous world of time travel while also dealing with the complexities of her personal life, including her budding romance with Gideon, another time traveler from a rival family.

The story is fast-paced and filled with twists and turns that will keep readers on the edge of their seats. Gier does a fantastic job of building the tension and suspense, while also weaving in moments of romance and humor throughout the book.

One of the highlights of “Sapphire Blue” is the intricate world-building that Gier has created. The details of the time travel rules and the different factions at play add depth and complexity to the story, making it a truly immersive reading experience.

Overall, “Sapphire Blue” is a captivating and entertaining read that will appeal to fans of young adult fantasy and romance. Gier’s writing is engaging, and her characters are relatable and well-developed. I highly recommend this book to anyone looking for a fun and engaging read.