British singer-songwriter Cat Stevens, known for hits like "Wild World" and "Moonshadow," is postponing his book tour in North America amid visa issues.

Stevens, 77, was set to tour for his autobiography, "Cat on the Road to Find Out," which will hit shelves Oct. 7. In a post to Instagram Sept. 29, the singer announced that fans in the U.S. and Canada would need to wait for another time to greet him in the flesh, as the planned tour stops could not "go ahead as scheduled in October."

"Waiting months for visa approvals, we held out as long as we could," he wrote next to a carousel of photos seemingly showing him at another stop on the book tour. "However, at this point, the production logistics necessary for my show cannot be arranged in time.

"I am really upset!" he continued. "Not least for my fans who have bought tickets and made travel plans to see me perform. North American audiences may still get a chance to see the tour if visa approvals eventually come through. Those dates would be some time away because of other travel tour plans but, hopefully, fans will be able to hop on the Peace Train route at some time in the future."Meanwhile, tour delays should not affect the book, which you’ll still be able to enjoy," he finished. "The obvious benefit of it being — books don't need visas!"

Stevens, who now uses the name Yusuf Islam, chronicles his rise to fame in the book, detailing several near-death experiences, and his journey to become a devout Muslim in the late '70s. The autobiography offers an inside look at his decision to leave the music industry, which shocked fans, and to dedicate himself to activism and faith. He returned in the mid-2000s, releasing several albums under his new name.

This article originally appeared on USA TODAY: Cat Stevens postpones US book tour amid visa issues: 'I'm really upset!'

Reporting by Anna Kaufman, USA TODAY / USA TODAY

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