Harry Potter and the Backbreaking Mountain
QUITUS QUEERUS!
Fear and Loathing in Privet Drive
*
Harry Potter and The Mysterious Bloodstained Broomstick*
Harry Potter and the Backbreaking Mountain
QUITUS QUEERUS!
Fear and Loathing in Privet Drive
For that, you get slapped with a wet trout.
My favourite is still Harry Potter and the Attack of the Fellytones.
Harry Potter Has Two Mommies
I am 100% sure it is NONE of these:
Harry Potter and the Sexual Awakening
Harry Potter and the Nickel-Bag
Harry Potter and the Lonesome Cowboy
Harry Potter and the Head Mistress
*Harry Potter’s Jug Band Christmas
Harry Potter, the Witch, and the Wardrobe
Harry Potter and the Insufficiently Locked Bathroom Door
The Cook, the Thief, His Wife, and Harry Potter
Harry Potter and the Editor Who Lived
Harry Potter and the Parva Patil Polyjuice Pandemic
Harry Potter and the Anticlimactic Ending*
Well, I’ll bet that the title starts ‘Harry Potter and’; as for the rest, I’ll pass.
Ron Weasley and the stupid surprise ending
Harry Potter: Pimpin’ Dat Hermione For Big Bling-Bling.
Shortly to be followed by Harry Potter And Lots & Lots Of Penicillin.
Highbrow:
Last Year at Harry-in-Bed
Lowbrow:
Harry Potter and the Embarrassing Trouser Tent
Harry Potter and his Amazing Performing Ferret
Harry Potter and the Deflowering of Ginny Weasley
Harry Potter and the Oscillation Overthruster
Harry Potter and the Deus Ex Machina
Once Upon a Time At Hogwarts
The Good, The Bad, And the Slytherin
For a Fistful of Sickles (or, if you want to be lowbrow, For A Fistful of Knuts)
For a Few Sickles/Knuts More
You left out Levicorpus 'Em High.
Harry Potter and the Apology for the Last Five
She’s rich. She has em made special by the Royal Mint specificly for arse wiping. 
Harry Potter goes to Hawaii!
I know both the title and the key dialogue:
Harry Potter and the Death Stare
“Harry … I am your father!”
Harry Potter and the Horcrux Hunt (Possibly a very accurate description of book 7)
Harry Potter and the Defeat of Voldemort (Possibly a bit too obvious)
Harry Potter and the Martyr of Hogwarts (Can you guess the ending?)
Harry Potter and the Gruesome Death of Hermione (Might upset a few fans)
Harry Potter and His New Pal Satan (The fundies were right all along!)
The Trouble With Harry.