Where Can I Buy Folklore Books That Are Good To Read But Cheap In Price?

This Query only goes out to Metro Manila residents. Reading is one of my fave hobbies. Especially if it's about folklore and supernatural stories. I've been fascinated by such genre of books for just about a few years back, that was 2010 I think when I bought 'The haunted Homeland' by Michael Norman and one by Sean O'Faolain which contained magnificent short stories, I bought 'em at SM South in Las Pinas on a 'Pick A Book' section for only 90 and 5 pesos, respectively- cheap huh? But last week I went to SM Calamba in Laguna where it's the nearest SM here in Cabuyao and was disgusted to find out that they don't have such section. Do you have any idea on where I can find such books aside National Bookstore?If you know one in Manila please share it to me, and some other time I'd definitely look for it.