“Passport to Danger” by Franklin W. Dixon

Walls of skulls, a flashlight beam, and somewhere down in the dark tunnels under Paris, someone is plotting against the whole city!

Frank and Joe Hardy can’t pass up a chance to volunteer at a big soccer match in Paris. But soon things start going wrong at the stadium. Equipment breaks, protesters gather, and there are just too many “accidents” for it to be bad luck. The brothers smell sabotage, and their investigation takes them from a secret passage in the Louvre to an old castle and deep into the famous Paris Catacombs.

This is Hardy Boys mystery #179: fast, twisty and full of danger. It’s perfect for readers ages 8 to 12 who like their adventures with a little spookiness.

This paperback is in acceptable condition, with heavy wear to the back cover and spine. It’s still a great reading copy, ready for its next detective at Dead Tree Dreams.