"Anyone who loves romance must read Sabrina Jeffries!" --Lisa Kleypas, New York Times bestselling author An Amazon Best Romance of the Month A USA Today Bestseller A sexy and distracting rake is tamed by a scholarly heroine with a penchant for the sciences in this dazzling and witty tale of Regency London. A past kiss with adorably bookish Miss Olivia Norley should be barely a memory for Marlowe Drake, the Duke of Thornstock. After all, there are countless debutantes for a handsome rakehell to charm beyond a young lady whose singular passion is chemistry--of the laboratory type. But Thorn has not forgotten--or forgiven--the shocking blackmail scheme sparked by that single kiss, or the damage caused to both their names. Now Thorn's half-brother, Grey, has hired the brilliant Miss Norley for her scientific expertise in solving a troubling family mystery. And the once-burned Thorn, suspicious of her true motives, vows to follow her every move . . . For Olivia, determining whether arsenic poisoning killed Grey's father is the pioneering experiment that could make her career--and Thorn's constant presence is merely a distraction. But someone has explosive plans to derail her search. Soon the most unexpected discovery is the caring nature of the reputed scoundrel beside her--and the electricity it ignites between them . . . "Intoxicating...Jeffries's perfect blend of romance, mystery, and suspense is sure to have series readers anxious for more." -- Publishers Weekly