"Elvis who?" was photographer Alfred Wertheimer's response when, in early 1956, an RCA Victor publicist asked him to photograph an up-and-coming crooner from Memphis. Little did Wertheimer know that this would be the job of his life: just 21 years old, Elvis Presley was--as we now know--about to become a legend. Trailing Presley like a shadow, Wertheimer took nearly 3,000 photographs of Presley that year, creating a penetrating portrait of...