Brown leather-bound notebook with pressed flower

I'm missing my brown leather-bound notebook, about 5x8 inches, yesterday around 3pm near Circle Centre Mall on Meridian Street in Indianapolis. It’s well-worn, with a red ribbon bookmark peeking out and a small pressed forget-me-not tucked inside the front cover. On the inside front page there are a few sketches and my grandmother's handwriting in pencil, and the initials 'P.P.' embossed on the cover. The notebook holds a lot of personal notes and poems; it’s sentimental and really important to me. If anyone picked it up, I’d be incredibly grateful to get it back—the memories and ideas inside mean a lot to me.