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Book 1

- Set after the battle of Hogwarts
- Harry is sentenced to Azkaban but is freed after a year or so
- Lives with and becomes close to George Weasley, but they never date
- Befriends misunderstood death eaters
- George is killed and Harry has his body cremated
- Harry mourns George and carries around the urn of ashes
- He somehow ends up in the past (Roman times)
- He has to fend for himself
- Builds a temporary house for himself
- Learns that he can grow dementors from seeds as long as they are planted in a dead body/heart and watered with blood
- Can communicate with the dementors he creates, as he could in Azkaban
- He is immortal
- Becomes one of the most feared and dangerous wizards in history
- Relives world history
- Builds a large mansion for himself, his dementors and his slaves that are described as looking like Draco Malfoy
- Continues growing his dementor army
- Raids several villagers but takes pity on a young girl, and takes her home as his surrogate daughter

I can't remember the rest of the events, but I hope this is enough of a description to help

Please leave a comment if you know the name or author of the book as I'd love to read it again