Well I you are referring to Sher Muhammad Chaudhary's book, the examples solved in the book are not that hard if you have gained the concept; anyways if u are feeling difficulty try getting notes of different professors on this chapter. In Multan the professor we prefer for the notes is "Azam Pervez" I don't really know about other cities. but do visit various popular photocopiers and ask them for the notes of any chapter(notes are written separately of each chapter here in Multan).