I'm wondering if anyone knows what book this is (I read it around 1972):
Some kids are scuba diving and discover a scaly green humanoid encased in a block of crystal. Somehow they awaken him/it and he involves them in his search for his people, who live under the earth and travel around in these rock-boring machines. Or something to that effect.
I remember it greatly impressed me and my friends at the time as it made the rounds.
Thanks for any help!
Some kids are scuba diving and discover a scaly green humanoid encased in a block of crystal. Somehow they awaken him/it and he involves them in his search for his people, who live under the earth and travel around in these rock-boring machines. Or something to that effect.
I remember it greatly impressed me and my friends at the time as it made the rounds.
Thanks for any help!