Robinsons Galleria Sale Next Week

What gets me excited about mall-wide sales despite not being a shopper by nature is that all the shops are (perhaps unfairly) required to go on sale as well (of course there's usually more foot traffic in the mall during sales). So Robinsons Galleria will be on sale next weekend (Aug. 31 - Sept. 2) and that means shops like Neutral Grounds (hello RPG and CCG stuff!) and Comic Odyssey (comics and manga!) will be on sale as well. The only bad thing about all of this is that it's coinciding with the Manila International Book Fair. So do I buy books or do I buy manga?