Astrolabius becomes an explorer!
In the fifth book of the series 'Astrolabius Lives on the Moon', the excitement is not long in coming. Astro and Nolan get a place in Viktor Romaneschko's project group and are allowed to catalogue valuable rock samples. This is met with a lack of understanding by a team member of the five-year mission. Viktor clears the air. Astrolabius follows a lead that takes him back into the catacombs. This time, he's not alone down there!
Something amazing is hidden in the dark labyrinth. Astro and Nolan make a new friend.