My favorite story's story

I have a manuscript that I really like. It's called Mystery at the Museum of Storybook Artifacts. It's structured using the alphabet but it's not intended to teach it.  The curators of the museum have discovered Snow White's poison apple has been stolen. They search the museum visiting every letter and meeting storybook characters along the way. They bump into the Big Bad Wolf and an Evil Queen who they suspect but have no proof as to their involvement. In the end everyone lives happily ever after. Well almost everyone.

I have submitted it to 8 places/people. I have revised it many times. I have had it critiqued by my 2 different groups and a writing instructor

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I really like it but it hasn't found the one editor or agent who loves it.

I've been thinking. Most of the books are character driven. The market is wanting characters to fall in love with. This is a plot driven story. Maybe that is it's problem for the lack of interest. 

I've decided to set it aside for now. When I get it out again I have decided to make the curators more important, make them the center of the search rather than the apple. Then we'll see what I think of it.