In 1959, Hans Sidén began as a freelance film and pop music writer for Göteborgs-Posten.

The book "The Boy in the Paisley Shirt" is his story as seen through the camera. The following text describes the book:

He sat so close to John Lennon that he could have touched his feet if he had leaned forward when the Beatles played at the Lorensberg Circus in October 1963. He chatted with the Rolling Stones in a room at the Park Avenue Hotel, went to the Hvita Dufvan discotheque with The Who and had dinner with The Troggs. He hitchhiked with the Tages to Stockholm and the Hep Stars to Borås, invited Cat Stevens home for homemade pizza, lent stacks of Stax and Tamla Motown singles to Clem Dalton, who was an imported DJ at Liseberg's Pop In Club, and attended every soundcheck when the stars came to town. Journalist and author Hans Sidén was constantly in the front row during the 60s when the music scene exploded in Gothenburg. His photographs are a vibrant testimony to a decade as distant as it is marvellously present.