A President Trump impersonator brought the Oval Office to London's Waterloo station on Monday to mark the global release of a thriller co-authored by James Patterson and former US president Bill Clinton called "The President is Missing." /VCG Photo

The work of fiction follows the sudden disappearance of a sitting US president, who goes undercover to stop terrorists from unleashing a global cyber-attack. /VCG Photo

Clinton’s involvement with the book was reportedly extensive. The thriller draws on the former US president’s knowledge of holding the office and touches upon his experience of confronting an impeachment. /VCG Photo

A TV series based on the book is set to be aired next year. /VCG Photo