The Grandson (Percy Jackson/Harry Potter Crossover)
  • Reads 340,644
  • Votes 8,134
  • Parts 34
  • Time 5h 45m
  • Reads 340,644
  • Votes 8,134
  • Parts 34
  • Time 5h 45m
Ongoing, First published Feb 01, 2017
The war was over, Gaea was back in the dust, and Percy could finally get some well needed rest. He couldn't wait to spend the rest of his life in peace, living in the Roman town with Annabeth, occasionally visiting the rest of his friends. It was going to be a good life.

Or maybe not.

A new threat is brewing and it doesn't look like one that can be solved by just ignoring it.

When a bunch of wizards come to Percy's house to tell him that he had yet another evil grandfather, things turn upside down. He's dragged back into the hero life by his ankles.

Meanwhile Harry is also having a hard time. There's been many things on his mind this past year.
-A Defense Against the Dark Arts teacher with a personality like poisoned honey
-A venomous, disgruntled house-elf
-Ron as keeper of the Gryffindor Quidditch Team
-Malfoy's annoying antics
-The looming terror of the OWLs

...and of course, the growing threat of He-Who-Shall-Not-Be-Named and his newest addition to the family. A grandson named Percy.

This story takes place after Blood of Olympus and during Order of the Phoenix. How will things end for The Boy Who Lived and The Savior of Olympus?

....

Cover by me
[began - January 31, 2017]
[last updated - May 18, 2021]


R A N K I N G S
#2 in "demigods" [May 2020]
#12 in crossover [April 2021]
#40 in "percyjackson" [August 2020]



I obviously don't own anything except for the plot. The characters all belong to Uncle Rick and J.K. Rowling.
All Rights Reserved
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Collision Course  (Percy Jackson and Harry Potter Crossover) by goodness_graecus
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Harry stared at me. "You're just like him. Looks like you do take after your uncle," He sneered at me with an undertone of sadness," He killed my parents and tried to kill me, too. Is that what you wanted to hear? When I was eleven, eleven, He came back as one of my professors. He tried to make himself come back. But I beat him. Then," He pointed at Ron,"His little sister was possessed by the man who ruined my life. He almost got back, but we destroyed the diary and saved the muggle-borns. Then, I find out t hat my godfather was an evil mass murderer but he was actually innocent. Then, Ron's rat turned out to be Peter Pettigrew, who was Volde-" "Harry, no! You can't say his name!" Hermione burst in. She looked afraid. "We'll have to face the death eaters and we're not ready for that." "'Death Eaters'." I said in disbelief. Trying not to laugh, "Who would want to eat Thanatos?" ************* This takes place after Blood of Olympus, before The Hidden Oracle, and during Deathly Hallows. It is mostly in Harry's and Percy's point of view but a few others are thrown in. I worked really hard on this and I really hope you guys enjoy. The first couple of chapters are about 500 or so words but they get longer, I promise. If there are any spelling mistakes or grammar mistakes, feel free to comment them down below. It is an alternate ending to Deathly Hallows. Please don't kill me when you read the bonus chapter/ epilogue. In your demigodishness and all that, stay potterheads. Love you guys! Thanks for reading!
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18 parts Complete Mature

Percy Jackson to the rescue again, but this time, it's not as easy. Not only has his old evil grandfather Kronos Aka the time freak risen again, but he brings along another friend. An all evil all powerful Wizard that goes by the name Voldemort. Percy gets dragged into yet another war of tyrants, and the protection of the boy who lived. But will Percy be able to overcome the sadness and grief of his friends deaths, and win this deadly war? Or will he crumble and fall to the pressure of saving lives? Ok, this story has been edited, or is in the process. There is a second book to this, but i'd advise you not read it yet otherwise you will be thoroughly confused. AND finally, I had a very.... nice chat with Thanatos and got back the following characters. No death threats against death involved... Fred Dumbledore All the dead members from the order of the phoenix and that's it I think. I don't know when the story is set in Harry Potter times, i've just mixed and mashed