ABANDONED. YA scifi/fantasy book/series - manhattan project themes, baseball themes, 3 protagonists, 1 girl, 2 boys

[Mark]

Possibly a book, possibly a series - listened to as an audio book on a car trip in the early 2000's. Book was from Cracker Barrel (which is apparently Ingram Entertainment titles, if that helps).

The book followed three protagonists, a girl and two boys. They traveled to other worlds or alternate universes through tunnels. The other worlds usually had some sort of baseball theme. At least one had a society of gnomes who used it as their court procedures. The girl protagonist was a pitcher.

The had a map that helped them find the way - depending on how it was folded, it could show a neighborhood, a city or even be a star map.

The antagonists had eyes you could see through, all the way to what was on the other side of their heads - photographs of Manhattan Project scientists showed that many of them were bad guys due to this effect.

[Kris]

Btw, I think that's "Ingram Entertainment".

[Mark]

Fixed, and Thanks!

[Ayshe]

Summerland by Michael Chabon? (Someone on abebooks has replied to your post there or post very similar to yours).

[Lobstergirl, au gratin]

Mark, was your book "Summerland" or are you still looking?

[Kris]

No response, moving to Abandoned folder.

Mark (OP) was last active on the site in November 2017.