Currently and proudly I have a copy of Philip Jose Farmer's Tarzan Alive in my bathroom. I have been working my way through his 'biography' of Lord Greystoke. This book, like his The Other Log of Phileas Fogg and A Barnstormer in Oz are fantastical takes on classics.
If you love to read and have read most of the legendary fantasy and sci-fi novels, then Farmer's riffs on the works of Jules Verne and Edgar Rice Burroughs or on Doc Savage and Sherlock Holmes adventures should be on your nightstand or toilet bowel.
His hard fantasy and sci-fi is fantastic as well. To Your Scattered Bodies Go is original and thought provoking. It is the introduction into his Riverworld Series. Then there is his World of Tiers Series, which may be one of the best in science fiction.
Read him and weep.