Over the years I have collective several textbooks and references. They are all in our house for anyone else in the family to use. They helped me a lot, some will benefit from them too of course. But it seems no one will be needing them soon, as everyone is almost finish in the studies which are not quiet related to my field. I can still use some, but others I am thinking of selling. There is a website actually you can also sell textbooks. Who knows it’s one of your books I may buy soon too.