this book is pretty much just an introductory, I like how it is not so mathematically rigorous which makes it easier to give a rough impression about vector analysis. The last chapter which specifically deals with the application of what we've learned in the whole book, is absolutely a highlight of this little book. Finally, it is a textbook with solutions of its exercises! Although the exercises are not hard enough to make people totally understand the content, they are enough for people to get used to the language of vectors and tensors, and get prepared for a more rigourous intuition.
p.s. I like how it derives Navier-Stokes' equation from isotropic elastic solid.