There are engagement session locations that look beautiful in photographs, and then there are locations that feel like the couple who chose them. Macdonald Book Shop in Estes Park is firmly in the second category. When this couple told me they wanted their engagement session in a bookstore, I didn't hesitate. Macdonald Book Shop has been a fixture on Elkhorn Avenue since 1928 — floor-to-ceiling shelves, narrow winding aisles organized by genre, a children's section bright wit