Progress on a Logline

I'm not going to pretend that this is the final version of my logline, but it's starting to resemble my vision for this novel. It's time to float it past some people. If you have a comment, please leave it. It can be specific (certain words that don't fit or a question on the plot) or very general (love it or hate it).

If you think you read this genre, but this doesn't look like a winner, I'd especially appreciate hearing from you.

On the verge of a another slow small-town Summer, a shy used book store owner, who prefers the company of books to most people, receives an old and incomprehensible tome which she finally interprets as a book of wholly useless magic with the help of her University-employed cryptanalyst/hacker best friend; but when she uses the text and finds herself a person of interest in a felony theft investigation, she must learn to make real-world friends and request their help to undo her mistakes, before the mysterious group attempting to purchase the text decides instead to take it from her or she finds herself facing a Federal prosecutor. – The Compendium of Curiosities and Impractical Magic