I acknowledge that your book may be niche, and that if you were ever to seek feedback it ought to be from experts in the field (which I most definitely am not), but I would love love love love to read your book.I got my first rejection, just a day or two after sending out queries. It was a very nice personalized note about how my niche (books about books) is a tough one and I might want to go to a small publishing house. (I still want an agent, even for a small press, but I guess that's not her scene. She's at a big NY agency.)
So all around, very pleased with my first rejection!
So please keep that in the back of your mind as you slog through the misery that is querying and publishing: An utterly unimportant nobody from nowhere would kill to see (read) how the literature of her childhood fits in with and has shaped her today.
You have an enthusiastic audience of one at the very least.
Please do share with us when your book is published and available for purchase.