Another excellent Alien Voices production. These are very well-done - the sound effects and music never annoy me or distract from the performance as I often find happens in other dramatized recordings. It's fun to try to identfy which Star Trek regulars are playing the supporting characters.
I actually read this book in high school at some point, but had forgotten the plot almost completely. Axel and his uncle, German scientists, find a document leading them on a voyage down an Icelandic volcano, and emerge in Sicily. I'm at a loss to explain how they deduced they had reach the exact center of the earth, but it was a fun trip.