Doing physics homework is rarely truly fun, but a good textbook can at least reduce the stress and confusion/frustration levels associated with working problems and learning material.  This book is basically what I said in the title:  Helpful, clear, and readable, which are three things that are essential in any informational book yet sadly lacking in so many physics textbooks.  Excellent book.  Also, there are amusing footnotes sprinkled throughout the text, including some anecdotes/commentaries on physics pillars such as Niels Bohr.