Instruct: Classify a review as either positive or negative.
Query: just nice

this book is realy nice, i liked because of its clear explanations and the mathematics amount is just right.this subject could get mathematically ugly very easily if the author isn't careful.the illustrations included are also very helpful.i gave this book 4 stars, because is simply didn't reach the 5 stars bar for another book i bought;written by Jack Golten "understanding signals and systems" it is rather is an introduction to the subject but it is realy inspiring and should be on the top of all books on this subject, i'm very sorry to write about another book while reviewing lathi's book, my main moral is to benifit students who want to understand the subject by hinting about another Guru Master.