In the age of the Internet physical writing almost seem obsolete, but I do think there are some who appreciate the time worn art of actually writing. Many years ago they were a warm way of staying in touch. I believe they can make a come-back in the age of quarantine as a way of family members and friends keeping in touch. They aren’t reserved for the holidays, vacations or special occasions.
I came across this artist who does beautiful work. I never thought of using post cards for marketing your books.