Pressed in Kent by Kindlight back in 1986, Cathy was the first volume of a planned three volume book set. The intended second volume was going to show Kate as a teenager, and the third volume was going to be of Kate as an adult - sort of a present day thing at the time. The planned second and third volumes were later scrapped by John Carder Bush. With a publishing run of only 500 pressed copies, this book is extremely rare and highly sought after these days.
Note: In 2015, Cathy was reprinted by John Carder Bush in two editions; a deluxe signature boxed edition at £120 and a more affordable standard release at £40. Shown below is my original 1986 copy of the book. I have no plans to buy either version of the reprint.