Present edition of Let us "C" is really useful to the persons who dont know anything about "C", I mean who is blank in this programming field, Let us "C" makes you to go through all the logics related to arrays, pointers, 2-D Matrix, 3-d Matrix, etc.its worth to buy this book as it is useful to you throughout your development period.It is more useful to the persons who are in Diploma and Degree of Computer Technology.I can suggest many other good books also like "C programming by Balaguruswamy" but I will recommend only [Let us "C"].
I have read it & gone through it, i really find it worth to buy this book.This book starts with the basic concept of "C programming" and then moves on, you wont find it hard to practice on your computer after refering this book.Its a step by step formalisation of "C programming".
As all you know that "C" is very vast, u cant learn it in one day, give your time for Let us "C" then surely you will be able to find answer of many questions.