E-books, or electronic books, are versions of a book you can read online. Some of these books can be printed or downloaded, often a limited number of pages at a time.
National Academies Press-Most books published by NAP can be downloaded for free in PDF format. Find the book you want, skip the print price, and click "Download Free PDF." You must register to use the free downloads.
Government Documents-Materials created by/for the federal government are not copyrighted.
Spontaneity
Cumulative Effect
Page used with permission from UW Copyright Connection: Guidelines: Fair Use: Educational Copying