"KHO PING HO"

Just have lunch with the guys from the office. The topic for today was 'Kho Ping Ho'. Anybody knows that? I certainly familiar with the name, however, i have no chance to read the 'famous' book. People used to say that they are books for men only. Quite a contagious habit in 10-20 years back. I believe that my dad had read them too. Some people collected them, some people thought that those books have taught them things that you won't experience it in real life. I wonder??!!??