You're looking for a review of the book "Understanding Pointers in C" by Yashwant Kanetkar, and you want to know if it's available for free PDF download. Here's what I have to say:
"Understanding Pointers in C" by Yashwant Kanetkar is a popular book that focuses on explaining pointers in the C programming language. The book is designed for beginners and intermediate programmers who want to improve their understanding of pointers, which are a fundamental concept in C.