Andy Malone, his sister EmmaLea, and their cousin, Paul, have discovered a cave on their secret island. When the two families' vacation plans fall through, the three decide to camp out on the island for a few days. They discover that their cave links with a tunnel-a lava tube leading under the river and across town. But who has left the footprints they find in the tunnel? And why does the tunnel lead to the Courthouse?
ThriftBooks sells millions of used books at the lowest
everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We
deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15.
ThriftBooks.com. Read more. Spend less.