Have you read "Dandelion Wine" by R.Bradbury?
The postcard reminds me about this book.
The book about one summer from the life of the author, about three summer months of 1928 year.
Every summer heroes of the book prepare Dandelion Wine.
This wine keeps in itself events summer, when the wine was made...
Especially nice to read "Dandelion Wine" in autumn, because the book brings pleasant feelings and relieves with autumn sadness.
And recently I have gone to a theatre for play on this book.
The play was profound and meaningful as the book.
So if you haven't read "Dandelion Wine", now is the best time to do it.