Meghan Markle’s memoir is set to spark a race for the best bombshell book following Prince Harry’s success, according to inside sources. The Duchess of Sussex is thought to be considering publishing a tell-all memoir to follow in her husband’s footsteps. Prince Harry’s explosive book ‘Spare’ made waves in January 2023. Industry insiders suggest Meghan’s potential memoir could spark a fierce bidding war among publishers, with potential earnings in the tens of millions. A source told Closer Online: “The word in publishing circles is that everyone’s mad to land Meghan’s memoirs and the numbers be…