On a summer day in 1862, a tall, stammering Oxford University mathematician named Charles Lutwidge Dodgson took a boat trip up the River Thames, accompanied by a colleague and the three young daughters of university chancellor Henry Liddell. To stave off tedium during the five-mile journey, Dodgson regaled the group with a story of a bored girl named Alice who finds adventure in the most unexpected places. By the day’s end, Liddell’s middle daughter, also named Alice, was so enthralled by this...