keyword: Textbooks – 2 free books.
These books are included in the Directory of Open Access Books. This means that they have been peer-reviewed and are of interest to scholars.
These books are available in EPUB format - good for iBooks, Nook, Kobo.
Rajiv S. Jhangiani and Robert Biswas-Diener, editors
Alexander Karp and Fulvia Furinghetti