Sci-Fi again....I read the book "Riverworld" by Phillip José Farmer, and thought "wow! What a fascinating idea/concept"....then he started writing sequels, and I thought "what a descent into personal idiosyncrasies and turgid, repetitive dwelling on irrelevant themes!" He missed SUCH a chance to explore some really fascinating ideas, but chose to introduce seemingly random characters and plot twists, much like the later "Dune" series, and lost the feel of the original idea.