Man I just sold off my copy to a fellow softie in the classifieds section. It's a great book, starts from the real basics to the tough stuff in terms of technique, and even throws in a bit of theory for you to get started as well. THE book to own if you wanna shred.
Anyways, in Singapore, it's going to be pretty hard for you to find a place selling this new at a good price.
You're best bet would be to go to Memphis Music in Excelsior, near Guitar 77. The owner Mr. Ho, is a really great guy I've been buying books, CDs, videos and DVDs from him for almost 10 years now!
His prices are the best you can find.
Just go down, check out the catalogs he has there and place an order. Lots of other good stuff for you to choose from too.