Hmm... Robin Hood makes me think of the Land of Stories.

The land of stories makes me think of Clap When You Land because it's about two siblings (kinda a stretch). Oh, also, in both books the dad is dead.

Clap When You Land reminds me of Wonder because it's a hard experience for a realistic character.

Wonder reminds me of Little Universes. One of the main characters is really into space (like Auggie w/ his helmet)

[font=big caslon]That reminds me of Zodiac, because you mentioned that the character is into space and Zodiac takes place in space.[/font]

I've actually never read Zodiac, but from what you just said it reminds me of the Lunar Chronicles.

Lunar Chronicles reminds me of The Girl who Drank the Moon because of the whole moon/lunar thing

Cool! I started that book I think, but didn't finish. That reminds me of...Where the Mountain Meets the Moon because, well, I think that one's obvious.

Where the Mountain meets the moon reminds me of Starry River of the Sky (the sequel. someone in my family is reading them.)

I've never read it, but the title reminds me of Milky Way Railroad.