Book request: Hi! Thanks for any help possible. I found this book in a Moody Bible bookstore (or something like it) and it was my first foray into dystopia. I believe I was about 7 or so making it roughly 1995+ when I bought the book. It was the second in a series and had a seafoam green cover - a series about a group of kids traveling around a post apocalyptic world on some sort of quest. They all believed in Goed (not misspelled, pretty sure it was just supposed to be like God) and that's why I'm assuming it appeared in a Moody store. They prayed (talked?) to Goed when in trouble This book was not the first in the series, and it was based around this group of kids visiting an underwater city of some sort and had some type of vehicle they used to move around more quickly. I have faint impressions that dolphins may be involved as well. That's a lot of vague info so any hints would be appreciated bc not knowing the name has bugged me for years Thank you!

Matching book description: After a harrowing escape from the army of the Sanhedrin, Joshua Adams and his six young companions are thrust into yest another battle against Elmas, Chief Interrogator of the Sanhedrin and servent of the dark Lord Necros.Fulfilling the legend of old, the Seven Sleepers seek to follow their Spiritual leader Goel's instructions and are led into a most beautiful and frighten After a harrowing escape from the army of the Sanhedrin, Joshua Adams and his six young companions are thrust into yest another battle against Elmas, Chief Interrogator of the Sanhedrin and servent of the dark Lord Necros.Fulfilling the legend of old, the Seven Sleepers seek to follow their Spiritual leader Goel's instructions and are led into a most beautiful and frightening part of Nuworld.The evil Lord Necros is in control of most of the land; now he desires to conquer it all - even the cities under the sea! Josh and his friends are asked to help fight in the battle to save the lost city of Atlantis, but they must face unbelievable odds: the seven of them against an army of traitors and an ocean of terrifying creatures. ...more