The Hardy Boys series, first published in 1927, has sold more than 70 million copies! Now with a brand-new look, this is an edition that collectors won't want to miss! In The Secret of the Caves, the seventh book in the incredibly popular, long-running series, Frank and Joe Hardy discover the secret of the Honeycomb Caves while searching for a missing professor. A special treat for Hardy Boys fans and any reader who's new to the series!

Recounts the true story of how four boys looking for buried treasure in the south of France in 1940 stumbled upon something much more valuable--a sealed cave whose walls were covered with prehistoric paintings and engravings.

One of the most spectacular archaeological discoveries In Israel took place in 1960 when the legendary Yigael Yadin excavated a cave in the Dead Sea area subsequently called the "Cave of Letters." The cave contained the largest cache of ancient personal correspondence and documents ever uncovered in Israel.

When Hildy finds a stolen watch concealing a crude, hand-drawn map, she is accused of the theft and must try to clear her name.

For ten-year-old Jonathan, his friend Jessie, and Dr. park, it was supposed to be a quick trip to the hidden cave. That's when the lights went out and Dr. Park disappeared, leaving Johathan and Jessie lost deep in the heart of the cavern.