I didn't find a thread covering this, and thought other people might have similar problems.
1. A man is drugged (in a drink?) and Shanghaied shortly before his wedding. He ends up on a merchant spaceship, and due to time dilation, can't "go home". They return 80 years or so later, Earth time. His fiance is still alive, and nver married. The political/religious norms have changed, and his life is in danger. He returns to the ship, and they continue their voyages through space and time. He eventually discovers that he was not picked at random.
2. A short story about an author who is being plagerised by a time traveller from the past. The author is the one accused of plagerism. I believe the story was written as a series of letters.
On a side note. what's the best way to include more details that might spoil the books for someone who hasn't read them?