Exercise 2 (Bin Bao)

From a software implementation perspective, library website is an interface to the underlying database. So it should provide common database functionality, including search, limited insertion and deletion (user side). Good searching interface is probably the top goal of the whole design. I need to come up with searching tasks, from simple to difficult. But I am not sure how difficulty a searching task usually is in a real usage. In other words, it may not be practical if we create a hard task.