There’s a book on the window sill, next to the balcony. One can easily imagine someone reading in the open window while enjoying the sun, then putting the book down to answer the door for a friend passing by who invited the reader to a drink outside on a terrace. Returning home later in the evening, the reader closed the windows and drew the curtains. The book forgotten on the sill. Maybe if the reader wakes up, sometime after we finish our morning coffee on the terrace across the street, and opens the curtains and windows, the book will be found.
(Amersfoort city center this morning)