This episode reviews The Secret of Secrets as both a return of Robert Langdon and a reminder of why Dan Brown remains so commercially powerful, even when critics roll their eyes. The novel sends Langdon into Prague, secret research, consciousness, symbols, danger, and the familiar machinery of codes, clues, revelations, and last-second escapes. In three minutes, the episode asks whether this book is clumsy, addictive, ridiculous, entertaining, or perhaps all of those things at once.