This book is a great book for people inturested in Personality Phsychology. It gives clear explanations and if it's still unclear it will give an example or two.

A textbook of personality psychology, but not of a traditional "theories of personality (Freud-Jung-Rogers-Maslow)" type. This is good, because this way it represents what is really going on in personality psychology, instead of what has been going on. One might want a better integration, but this simply does not exist as yet. The two alternative books that one might consider (and there are only two of them) are "Personality" by Caprara and Cervone (social cognitive approaches are better represented but almost no biology at all), and "Personality traits" by Matthews and Deary (has a narrower scope). All other personality textbooks are just outdated (starting from the table of contents).