Percy, Annabeth, Frank, Hazel, Jason, Piper, Leo, and Nico are going to Hogwarts to discover more about the wizarding world, but they have to keep undercover! What will happen as the (undercover) demigods and wizards meet?

If there was one thing Ron Weasley would never do, it was associate himself with a Slytherin. Until Konstantinova Nott, who may be the only exception to the rule. [HP; OOTP | COVER BY AMANDA] [K. NOTT SERIES | BOOK ONE]

Werewolf attacks on muggles were rare and unfortunately, muggles hardly ever lived through the attacks losing too much blood before help arrived. A bittersweet miracle occurs when muggle boy Keane Maven survives. His father is thankful for the man that appears to save his son's life after he nearly bleeds out on his bedroom floor, only nine years old at the time. However, while the case is rare in itself, it only gets stranger. Keane is to live with lycanthropy for the rest of his life, but they weren't expecting him to show signs of magic as well. Moments of accidental magic occur within the household, but Keane's name is not on the list written down by the Quill of Acceptance that writes the name of every magical child down at the time of their birth. Curious to see if the accidental magic is only a side effect of the bites, Keane is taken to Diagon Alley to retrieve a wand, a test to see if he actually possesses magic. No one really believes a wand will choose him, but the unbelievable happens: a wand does choose him. With no other choice, Albus Dumbledore, Headmaster of Hogwarts is called for a favour.

Hecate is worried. The demigod she sent to her pet world of witches and wizards has not returned. In her worry she goes to one she knows can help. She goes to the lord of the underworld. And takes the Ghost King.

Voldemort is alive, and growing stronger. The Ministry are ignoring Dumbledore's warnings and are making him out to be an old fool to discredit him. The Order of Phoenix are trying their best, but they aren't certain themselves. Harry Potter is losing his cool....and Albus Dumbledore is contacting Percy Jackson. Dumbledore needs Percy...knows that Harry is the one destined to defeat Voldemort, but desperately needs help. So he asks Chiron, and Percy Jackson is sent to Hogwarts to protect Harry.

currently undergoing heavy edits and rewrites; read at your own risk

After a life changing and magical year at Hogwarts, Nico sadly returns to camp half-blood. Although he misses the school of witchcraft and wizardry dearly, he is happy to see his friends again... especially a certain son of Apollo. But when the time comes for Nico, Will, Viktor and Fleur to meet up for their cruise, the two wizards insist that they pick Nico up at camp. There's only one problem with that plan... Viktor and Fleur still have no idea that Nico isn't really a wizard. Naturally, Nico and his friends at Hogwarts are destined to meet again. But with a war brewing in the wizarding world, and an old enemy of Nico's returning to take revenge, how can our hero possibly remain undercover. And how will he be able to protect Harry, destroy horcruxes and defeat his old enemy without failing? One thing is for certain, this just may be Nico's biggest and most dangerous adventure so far.

Camp half-blood is in chaos. Camp Jupiter just can't think straight anymore. Why? Because the only demigod son of Hades, Nico Di Angelo, is missing. No one knows where he went, why or how but they are determined to find him. The only person who seems to have an idea of his whereabouts is Hades but he has locked up the underworld and refuses to tell our heroes anything. Nico's sister Hazel is frantic and his boyfriend Will is worried out of his mind. But Hades can't throw the rest of the gang into this mess. No, it would be better if his son Nico does this on his own.

So this is a PJO/HP crossover. All rights go to Rick Riordan and JK Rowling. I do not own any of the characters!!!!!!! New Readers: I've started re-writing this story. Original chapters will remain available, but the plot has changed slightly so feel free to start reading at/after the Author's Note. All re-released chapters are titled with a "[v2]". Original summary: Percy's finally defeated Gaea, but the deaths that occurred along the way, and his trip to Tarturus still haunt him. In the midst of his mental struggles, Albus Dumbledore offers Percy a quest--protect Harry Potter. As Percy ventures into another world he hadn't realized existed, he learns that he has a much bigger role in the upcoming war against Voldemort than anyone could have imagined.

Roma Carlson had a BIG secret ... a nine month secret to be precise. Big jumpers and fake illnesses might have been enough if it weren't for one thing: her highly conservative Father had just become Defence against the Dark Arts teacher and planned to keep a special eye on her. Nymphadora Tonks had a kind heart, bright blue hair (usually) and a lot of time to kill ... as well as the ability to look like literally anyone at a moment's notice. Even though it was a long shot, dire circumstances forced Roma to reach out to the eccentric Hufflepuff for help. Desperation combined with a bubbly stranger, can lead to a decent plan, right?