The Last Best Quest Ever by F. T. Lukens

A fraudulent teen quester must team up with a brooding, royal rival on a perilous adventure to save her brother's life in this " witty ... lively, heartfelt " (School Library Journal, starred review) young adult romantasy full of mythical creatures by the New York Times bestselling author of Spell Bound and So This Is Ever After.

Seventeen-year-old Ellinore has the best questing record in the kingdom. Not even Aven--the infuriatingly charming royal who's become her fiercest rival--can compete. But every one of Ellinore's triumphs is a lie. The monsters she's slain? Staged. The treasures she's claimed? Planted. Tired of the charade, she shocks the realm by retiring during a royal feast.

Her hopes for a quiet life vanish when her reckless twin brother, Zig, bets his life on her ability to retrieve the horn of the mythical Elder Beast--a creature no one believes is real. To save him, Ellinore must return to the spotlight for one final quest. She's joined by Zig, eager to prove himself; Aven, determined to finally outshine her; and a ragtag crew of unlikely questers with big dreams, questionable skills, and a knack for trouble.

As the stakes rise, Ellinore must decide who she really wants to be: the fraud the kingdom celebrates, the hero it needs, or someone entirely new.