"Hardcore Twenty-Four" is a novel by Janet Evanovich featuring the beloved character Stephanie Plum. In this installment, Stephanie is once again navigating her chaotic life as a bounty hunter. She finds herself entangled in a series of bizarre and dangerous events, including the mysterious disappearance of a key character, Diesel, who has his own compelling agenda. This raises the stakes considerably as Stephanie must unravel the mystery that threatens to upend her world.