Can you identify a book from a hazy description?

Do you really really love lit? Try to figure-out the book from the clues! Tip: all these books are absolute classics!

1. An enigmatic tycoon who’s obsessed with a previous girlfriend enters some random guy’s first-person life.
2. Some guy discovers a female utilising A.I. technology to create pulp fiction. He at first finds her repulsive. But they put their differences aside for bonking sessions.
3. A guy chooses to adopt an orphan and favour this child over his biological children. Upon the guy’s death, his eldest natural son inherits the house, so maintains the orphan as a servant. When grown-up, the orphan falls in love with his adoptive sister.
4. An itinerant lives an ordinary day in a Fair City
5. Together with other economic migrants, some people set out to escape the poverty of the Dust Bowl era. They tell tales in overnight camps.
6. A bachelor will consent to marrying a young woman if she chooses to end her current union. She decides to dump her husband and child in order to pursue the young man’s indecent proposal.

Good luck! I’ll post the answers on my Facebook Page at https://www.facebook.com/author.neilmach if you get stuck!