Blue paperback mystery with cat doodle inside

I lost my blue paperback mystery The Silent Lane yesterday around 3pm. It's a standard 320-page paperback with a slightly bent spine and a small coffee stain on the back. Inside the front cover there's a tiny hand-drawn cat doodle and a yellow Post-it note with my mom's initials L.P. tucked between pages. The book has sentimental value—it's from my late grandmother and I really need to get it back. I probably left it near the Bob Hope Theatre on East 2nd Street in Downtown Stockton, maybe outside the café or near the box office.