There’s not much to it, but Somjai has been selling stationery, books and paint supplies to students and locals around Treepetch Rd. for 20 years. The interior is pretty much what you would expect from a B2S, only smaller and more retro, with a walkway down the middle and products to your left and right. Books are divided into different sections, from technology to cooking, and you can find all sorts of magazines in print, as well as pens and watercolors. Located inside The Old Siam Plaza. There are a further three branches located all opposite of The Old Siam Plaza.