You dont have to make a search to purchase it. The file is in pdf format, which you can download and print rightaway.
Well, it is really good to find the pdf paper and read it specially for those who cant afford to purchase books. Although I hold many academic researches , books etc in my computer, personally dont like reading the online paper , rather preferring to buy the copy of the book as sister utterred above. I have to smell each paper while reading, I have to touch the knowledge and take necessary notes where I receive the inspiration

. But for a book lover, he or she would be aware of the online books which attract her/him as well.
With peace x