The Kinokuniya at Ngee Ann City is Singapore’s biggest bookstore, but I’d say this is the runner-up. (I hear there’s a huge Times outlet at Punggol that might be bigger… I should visit!) This is the Bras Basah branch of a Singapore retail chain which is called Popular, presumably due to the Chinese habit of naming businesses with aspirational happy adjectives for good luck.
The place wasn’t looking so popular on a Monday afternoon, though, and I only went there to look for a specific kind of 2017 calendar, which they didn’t have. (Apparently the second week of January is too late to buy a calendar/diary/planner thing if you want a good selection to pick from; luckily, I eventually found what I was looking for at NBC Stationery at Raffles City.)
Despite the square footage, this shop didn’t have what I would call an impressive selection. There’s a whole floor of “assessment books”, locally produced test preparation workbooks for preschool through university, and six walls of “favourite characters” products (movie and television tie-ins), but only one or two shelves of picture books…
Here’s a post about places to buy books in Singapore.