Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very usefull book, for programmers.

This book,explaines how to build a compiler,from practical point of view,It let us to watch how we should reach the goal,instead of theortical expressions.Practicly it helps to build your own compiler,rebuil proposed to your own needs.At least effectively use already existen compilers,even in the case if you do not plan to build or rebuild any compiler.Just look about all that bloved code,done in last years.I guess most of modern programmes code theirprograms without picturing out how their programswill be looking like in final machin code.