Reynolds & Hearn will be releasing Script Doctor in February 2005 by Andrew Cartmel. "The Inside Story of Doctor Who 1986-89," the book by the original series' final script editor is "a unique insight into an area of the show's history that has previously been shrouded in uncertainty." Sylvester McCoy (the Seventh Doctor) provides the foreword for the book, which is listed on Amazon already. More details soon.
(Thanks to Paul Greaves)