I'm thinking along the lines of the sliders TV show or that jet li movie "The One". I don't mean alternate history where there is nobody from our world or a world with more or less the same history as ours that crossed over into it.
And not one where there is only one world getting crossed into(though there can be one world where most of the conflict happens).
the only one I have found was
The walls of the universe Which was a
GREAT book BTW.
Basically I'm looking for something like as if turtledoves books were all shortened and smashed into one book with atleast one main character going to all those worlds.
I've been searching with not much success.