It depends really, there are hard to find titles that are available as ebooks. While paper books is the traditional way to read. Readers of ebooks can have search functions, making it less difficult to locate information. Paper books are familiar and one can use it without electricity. Ebookx are better for hard to find titles. While paper books makes one feel at home when one reads it. It can speak of the generation one is in. For more options, I'll go with ebooks.