"Prisoner of the Khalifa: Twelve Years in Omdurman" is an extraordinary story of survival and faith in human power. Author Charles Neufeld recounts his twelve years in captivity under the Caliphate, controlled by Omdurman. This book is a documentary essay about the difficult trials that the hero had to face, his losses and victories. Neufeld skillfully tells about the extraordinary strength of the human spirit in the most difficult coexistence with evil and doomed captivity. "Khalifa's Prisoner" is a book that will leave an unforgettable mark on the reader's heart and inspire great deeds.