CHANGING VISION (4.5) is the second delectable installment in Julie E. Czernedas engaging Web Shifter series. Fifty years after shape-shifter Esen-alit-Quar reveals her true self to the human Paul Ragem, both are living under new names on a remote planet making a nice living from their import-export business. In fact, everything is going so well, they decide to take a vacation. That, of course, is when the trouble begins. Ms. Czerneda deftly spices an intricate, ever-surprising plot with breezy wit, characters with panache and irresistible style.