The self titled book, co-written by the star's mom, is set for release at the end of the month and tickets for the UK leg of the book tour have apparently sold out in one day.
According to UK-based TENEIGHTY Magazine, tickets for the tour, which kicks off on May 29, sold out in all of its seven UK locations, with multiple signing slots in each city.
Caspar, who will also be heading to America for a seven-stop US book tour, has encouraged fans outside of the US and UK to tweet him with suggestions of other places the tour could go.
So far, only a handful of local fans have suggested South Africa.
But even if the tour never reaches SA shores, Casper has promised that he will be coming home soon.
Speaking to popular radio personality Gareth Cliff on CliffCentral on Tuesday, Casper revealed that he is hoping to return to South Africa later this year to work with locals and give them exposure.
"I want to come home," he said "I want to work a lot more in South Africa with local YouTubers. I really want to come back a lot more."
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