Blue poetry paperback lost near Canterbury High Street

I lost a blue paperback poetry collection yesterday around 3pm. I was at the little cafe on High Street in Canterbury, Kent, near the Westgate Gardens, when it vanished from the chair pocket. The book is about 7 inches tall, with a slightly worn spine and a blue cover with a thin cream stripe along the edge. Inside the front cover there's a small green sticker with my initials 'PP', and the pink ribbon bookmark is sticking out. It has sentimental value - it was a gift from my grandmother, and I'm really hoping to get it back. If anyone found it, I'd really appreciate getting it back and I'm happy to meet up near the cafe to collect.