This was a very fun read. Its basically about a distant future where the moon has been colonized and where already travelling further into the universe. The moon has already reached the stage where tourism has its place. Pat, the "skipper" of Selene, a spaceship used to fly around the moon's surface so tourists could see the spectacle, is content flying his "ship".
But then, on the mission where just hopped on at the start of this novel, something happens. The usually still surface of the moon trembles due to forces risen from beneath and Selene gets into trouble.
The novel is mainly about the passengers of Selene trying to keep up spirits while waiting for their rescue and about the men on the outside, trying to find out what happened to Selene and to get its passengers safely out.
It's very suspenseful, full of thrills and is written very sharply. In all its a very well-written adventure novel where the science holds up, against the test of time, knowing that it has been written in the 60's, before we even set foot on the moon.
I've read Space Odyssey by Arthur C Clarke as well, and I don't know how he does it, but his science holds up. He must have had a time travelling machine. The Jules Verne of the 60's, of space.
Try it out if you like a straight forward space novel.