Guardian's Race - The Dragonriders of Fiorenza, #3

Fia has two weeks to rescue her father before his execution. She is deep in enemy territory, alone, and praying that nobody sees through her disguise. But when they announce a special dragon race, Fia is tempted as never before. In her new disguise, she can take part in the biggest race in all of Italia, something she'd wanted to do ever since she started riding a dragon. The prize money would ensure a life of freedom for Fia, and her sisters.
Wearing the glamour of her true love, Fia navigates the world of the dragonriders. Her enemies know she's there - and to lure her out, one of the dragons that is flying in the race is Ryelleth - and Carmelo, her betrothed, is flying her. Fia would walk into fire for Ryelleth. She'll be damned if she leaves without her.