Available at National Bookstore, Powerbooks, and the Filipinas Heritage Library
Prices range from PHP 1,500-PHP 1,800 for the softbound copy and around PHP 4,000-PHP 4,500 for hardbound.
It's sooo worth it! I'm not one to spend on books, but I think every Filipina should invest in a copy. I'm lucky that my dad and I share the same interests, and that we happened to visit National Bookstore during one of the very few Saturdays we share together. He paid for the book. Haha! He was even more excited than me.