Scott Keyes , 28 , has cracked the system around the world for free . The writer reveals his secrets in two eBooks and to MailOnline Travel . He says he was born with a rare genetic disorder called Trisomy 18.
Scott Keyes , 28 , has cracked the system around the world for free . The writer reveals his secrets in two eBooks and to MailOnline Travel . Tips include savvy use of credit cards , knowing when to book , and planning the destination after selecting the flights on offer .