Oh, the teachings of Don Juan was awesome, read it when you're on shrooms! It's a great experience.
But anyway, Jules Verne: His dialogues are forced, and he's so desperately trying to make his stories interestingishly by adding pseudo-scientific facts that it gets annoying. The imagination is great, but after a while it gets nhhhhah. Jules Verne is an imaginative guy that would have written great books if he'd used a ghost writers. Also, in his life he has never been outside of France, which explains a lot if you've read his books and still remember