And apparently, there's a section of the warehouse I left unchecked the last time I went there, and it had R. L. Stine's Goosebumps, Pittacus Lore's Lorien Legacies series (I Am Number Four, etc.) and Rick Riordan's Percy Jackson series at half-price.
Since I believe I'm too old to be reading Goosebumps anymore and I already have all the Percy Jackson books, I got whatever remaining Harry Potter titles they had—The Chamber of Secrets, The Prisoner of Azkaban and The Deathly Hallows. School of Fear was just P49 and I had already read the first few pages of Madeleine L'Engle's A Wrinkle in Time at a National Bookstore years before, so I got both of those too. I spent only P964 for all five books. Cheap, considering three of those are hardcovers.