AN ESSENTIAL GUIDE TO THE DARK TOWER SERIES--INCLUDING BOOK-BY-BOOK ANALYSIS AND INSIGHT INTO STEPHEN KING'S CREATIVE PROCESS. In 1970, Stephen King embarked on what would become the crowning achievement in his literary career-the Dark Tower. The seven-volume series, written and published over a period of 30 years, was inspired by Robert Browning's poem Childe Roland to the Dark Tower Came, as well as J.R.R. Tolkien's The Lord of...