Found: Pink-cover paperback mystery near Cambridge Central Library

I found a paperback mystery this afternoon around 2:15pm outside the Cambridge Central Library on Lion Yard, near Market Street. It's a trade paperback with a pink cover, a creased spine, and a coffee stain by the bottom corner. The title is 'The Night Circus' by Erin Morgenstern, and there's a blue ink note inside the front cover with the initials 'A.P.' and a faded bookmark tucked between pages. It seems like someone who cared about this book might be missing it, and I’d love to help reunite it. If this is yours, swing by the Cambridge Central Library desk and mention the pink cover with the blue initials.