"The Final Gambit" is the third book in the The Inheritance Games series by Jennifer Lynn Barnes. It continues the story of Avery Kylie Grambs, a teenager who unexpectedly inherits a vast fortune from the reclusive billionaire Tobias Hawthorne. As she navigates the complexities of her new life, Avery must solve intricate puzzles and face challenges posed by the Hawthorne family. In this installment, Avery and her friends, known as the Hawthorne brothers, delve deeper into the mysteries surrounding Tobias's legacy. They encounter new threats and uncover secrets that could change everything, leading to a thrilling conclusion filled with twists and revelations.