I went to the UST bookstore a couple of minutes ago to enquire about a book. I saw one of my favourite book that's going for a 25% discount! "Asymmetric Organocatalysis: From Biomimetic Concepts to Applications in Asymmetric Synthesis" costs HK$1063 and after discount it's only HK$797.25. Converting back to Singapore dollars, it'll be around S$174. Amazon is selling this book for US$195 and Clementi bookstore is offering me for S$210. Hmm it's damn tempting to buy this book ... but if I buy it, then I'll be S$174 poorer. Ahh, difficult decision.