The book continued to garner positive reviews and comments. In 1998, Amanda Foreman wrote for "The Sunday Times" of London, "I want to shout about "The Phantom" from the rooftops. I want to stand in Waterloo and press copies into people's hands. This is a book that should be in every home. ... Whether you are 8 or 88 Juster's mixture of allegorical wisdom and logical whimsy will take you on a journey of the spirit. "The Phantom" is a "mappa mundi" of our hearts, proving once again that in laughter and simplicity lies the truth of life". In a 2011 article written for the book's fiftieth anniversary, Adam Gopnik wrote, "The book is made magical by Juster's and Feiffer's gift for transforming abstract philosophical ideas into unforgettable images."