Differential Equations A Primer for Scientists and Engineers

From the reviews:

"The author of this book does a does a very creditable job of providing the basic material of ordinary differential equations. ... The book is largely aimed at average students in mathematics, science or engineering. The author suggests that stronger students can use the text as a bridge to more specialized books or more advanced courses. ... There are many exercises." (William J. Satzer, MAA Reviews, November, 2013)
"The author writes this book respecting his readers and caring about the way of exposing his ideas. The book is written in a style that uses words as a bonding agent between consecutive mathematical passages, which creates a pleasant and comfortable lecture. ... The book contains 232 worked examples and 810 exercises. ... We kindly recommend this book to future engineers and scientists as well as to all those interested in the topic, who encounter differential equations in their professional work." (Alexandru Negrescu, zbMATH, Vol. 1272, 2013)