Detective Comics #394 is a DC comic book that was published in 1969. It features Batman and was written by Frank Robbins with art by Irv Novick and Neal Adams.

In this issue, Batman investigates a series of crimes committed by a mysterious villain known only as the Spook. The Spook uses a range of unusual gadgets and tricks to carry out his crimes, leaving clues that confound the Dark Knight.

As Batman tries to unravel the mystery of the Spook’s identity, he must also contend with the fact that he is being stalked by a beautiful but deadly assassin named Silk. Silk is hired by a criminal mastermind named Maxie Zeus, who seeks to eliminate the Caped Crusader once and for all.

The issue features several tense and action-packed scenes, including a showdown between Batman and the Spook in a haunted house, as well as a thrilling chase sequence through the streets of Gotham City.

Overall, Detective Comics #394 is a classic Batman story that showcases the character’s detective skills and his ability to overcome seemingly insurmountable odds. The issue is notable for its striking artwork by Neal Adams, who helped redefine the look and feel of Batman during the late 1960s and early 1970s.