“Scintillating, coruscating, Beyond the Known show just how powerful the human urge to travel, to explore, to move always has been and always will be. It is a light on the past – and for the future.” – Anthony Pagden
“Beyond the Known is engaging, full-color route map showing us how we got here, and where we’re now destined to go.” – Tim Marshall
“Expansive…packed with information, the work testifies to Rader’s extensive research into, and avid enthusiasm for, the subject.’ – Publishers Weekly
“Exulting in the curiosity and audacity that have propelled past exploration, Rader will excite readers about the future.” – Booklist