KNOCK THREE TIMES... Trina Taylor's computer whiz nephew sent five chapters of her novel, Tomorrow's Yesterday, via computer to the publishing world. Great idea. Except it ended up in the files of big-city investment consultant Jonathan Castle--and sent some of his valuable data into the proverbial computerland sunset. The mess was cleared up... only after Jonathan was the very confused "honored guest" at a welcoming jamboree in Trina's hometown of Henry, Kansas. But it was worth every bewildering moment after meeting the delightfully intriguing Trina, a woman fate had sent knocking at his computer--and his heart.