Reddit reviews The Merlin Effect (The Lost Years of Merlin)
We found 1 Reddit comments about The Merlin Effect (The Lost Years of Merlin). Here are the top ones, ranked by their Reddit score.
Could it be The Merlin Effect by T. A. Barron? I'm not sure about a light (I think there may be something about one... but I think it was from the treasure itself...) but I do know they get sucked into a whirlpool although not into a different world, instead they find Atlantis. I may be a bit wrong since it's been a long time since I've read it.