Bookstore, Electronics Store & the Odd Melon

I went to a giant subteranean bookstore today to buy my Derivatives textbook. I thought that I wouldn't be able to find it, but it is really quite difficult to miss (see pictures).

I then went to Yongsan station, to the giant electronics market. It is several stories high and is located in at least 2 buildings. It is organized in cells, so all the camera-oriented shops tend to look the same. It was a fun experience anyway!

Last but not least, I picked up a strange looking fruit today. I was surprised to find that the interior of the melon is white, considering the colourful exterior. Here are some pics!