Penny Vincenzi's historical novel Something Dangerous is the story of the poor and privileged living in 20th-century London as the clouds of war start gathering over Europe. The dazzling Lytton twins, Adele and Venetia, are born into the great Lytton publishing empire. In 1928, on their 18th birthday, they are rich and admired, with a confidence verging on arrogance. But the specter of Nazi Germany is growing . . . Gradually...