I know they have totally different genres, but they are 2 of my most favourite authors.

Anyone heard/familiar with these 2 authors? I have read some of their books and are loving them, such as the Saxon Stories and Grail Quest from Bernard, while I have read Life Expectancy and Frankenstein series from Koontz. Does anyone recommend any other books from them? I'm interested in One Door Away From Heaven and Sole Survivor.