In "Of Neptune" by Anna Banks, the final installment of the Syrena Legacy series, Emma and Galen's love faces its most daunting challenges yet as they navigate the intricate politics and dangers of the underwater kingdom of Poseidon. Emma and Galen, now engaged, find themselves thrust into a world of treachery and intrigue as they attempt to forge alliances and uncover the truth about Emma's origins. Emma, a human with a mysterious connection to the underwater realm, grapples with her newfound powers and identity, while Galen, a Syrena prince, struggles to protect her from the dangers that lurk beneath the surface. As tensions rise between the kingdoms of Poseidon and Triton, Emma and Galen must navigate a web of deception and betrayal, with enemies both old and new seeking to tear them apart. With the fate of their world hanging in the balance, they must rely on their love and strength to overcome the challenges that stand in their way. Along the way, Emma and Galen are joined by familiar faces from previous books, including Toraf, Rayna, and Tori, who lend their support and expertise as they race against time to save their world from destruction. As secrets are revealed