Differential Equations covers everything from the history of differential equations, classifying types of them, to solving numerous first order, second order, and even higher order differential equations. Numerous applications are also given for each type, with an entire chapter dedicated to it. Each chapter contains multiple examples, and over 100 exercises are given at the end of the book. This book is a great supplemental to a differential equations course, or as a refresher for someone who took the class long ago. I hope you join me in learning something today!