The Final Gambit Barnes Jennifer Lynn (2022)

To inherit billions, Avery Kylie Grambs only has to survive a few more weeks in Hawthorne House. Paparazzi follow her every move, financial pressures are mounting, and danger is a fact of life. The Hawthorne brothers are the one thing getting her through it all: her life is intertwined with theirs, and they know one anothers secrets. But as the moment approaches when Avery will become the richest teenager on the planet, a visitor arrives needing her help, and their presence in Hawthorne House could change everything. Soon it becomes clear that one final puzzle remains, drawing Avery and the Hawthorne brothers into a dangerous game against an unknown and powerful player. Secrets, riddles, hearts and lives are at stake, and there is nothing more Hawthorne than winning.