All 56 classic Nancy Drew books, ranked

It's been nearly 90 years since Nancy Drew found her first hidden staircase, cracked her first code, caught her first crook, and got knocked out by her first chloroform-soaked towel. While countless movies and television shows have been made about our favorite girl detective, nothing comes close to the original books, with their action-packed (and occasionally outlandish) plots and fantastic cover art, which hint at the title's contents -- sometimes spooky, other times perplexing, but always ent...