I have just set up the Amazon Astore for you to choose the hard copy books that you need. Please click on the link and browse through the bookstore. At the right side of the bookstore you could also see some links to test equipment, tools, reworks stations and etc. Amazon.com is very reliable and you can purchase just about anything from them. Please click on the photo to visit Jestine Yong’s bookstore and is powered by Amazon.