I must say about a book by Capri and Panat which describes things rather easily. In this book, more preference is given for solving boundary value problems.
https://www.amazon.com/gp/product/8173193290/?tag=pfamazon01-20
I will seriously say that Jackson is tough to solve many problems, again many typical problems are not included in it. Is not there a book which could be more familiar and advantagable.