Download or read book Doctor Who and the Vortex Crystal written by William H. Keith, Jr. and published by Contemporary Books. This book was released on 1986-09-01 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reader, as the intrepid Doctor Who, must discover what power is eroding the barriers between time and space on the planet Gathwyr by confronting the dark lord of the Vortex Crystal