I think all of us who have ventured into the query world have seen this before - ahem - "Especially interested in boy books, stories that will appeal to boys, stories younger boys would love to read." etc. Now, I have a son who is just moving into independent reading, and I remember my very bright younger brother being generally disinterested in fiction, so I understand the intentions of finding books that will appeal to younger male type potential readers. I hope my son enjoys fiction as much as I do as he grows.
However, I am a bit suspicious that "boy books" might sometimes be code for "real books". Franchise building ideas because, you know, girls will read books with boy protagonists, but guys will not read "about girls". (Which is something I've see as a justification for this "boy books" preference.)
Girls read. Girls read fiction more than boys. Girls like good stories, and will read them even when they feature a male protagonist. Let's give them the great, fun, exciting stories they love and deserve, and invite the boys to the party, too.
And thank you, to all the brilliant, smart, funny little girls out there reading. It's a fantastic time to be a kid who loves books.