" Could Vader actually be Anakin Skywalker? the two men wondered. Based on Obi-Wan's account of what had occurred on Mustafar, Anakin's survival didn't seem possible. But perhaps Obi-Wan had underestimated Anakin. Perhaps Anakin's peerless strength in the Force had allowed him to survive. "

― James Luceno , The Rise of Darth Vader (Star Wars: The Dark Lord Trilogy, #3)