SOLVED. Kids/YA about a boy who discovers a world underground (think it’s a series). [s]

[Michael]

Hi- I’m looking for this book (I think it may actually be a series). A boy - about age10 - living in New York (?) discovers an entire world underground. I feel like the entrance may be under his bed. He and his younger sister go on an adventure down there. There may be some type of battle. It is sort of like a tale of off Lion the Witch and he Wardrobe. I feel like he is referee to as an “overworlder” or “above worlder” or something like that which is also the title of the book. I read it in approx 2010.

Thanks

[Joseph]

Maybe Gregor the Overlander by Suzanne Collins?

[Michael]

That is exactly it. Thank you.

[Joseph]

Glad to help!

[David]

FYI for those who may stumble upon this post looking for reading suggestions, the author, Suzanne Collins is also the author of the Hunger Games series.