This book is superb. I took calculus a million years ago in college, and have been struggling to be able to offer help to my own college kid with their problem sets, when they ask. No more! This book is concise, has GREAT examples that were clearly chosen with great care to cover the major types of problems (as you would find in a problem set) and gives clear, full, stepwise solutions to each.  It takes a lot less time than watching youtube math videos, and is so personally satisfying! The short explanation sections throughout are clear and on-point. Anyone who needs a calculus tune-up should consider this book.