I've got a Master degree in nuclear physics but still i've got a lot of question unsolved about QFT and his applications.<br><br>This book has made me an incredible boost to  improve mi knolewge of the matter and mainly a big perception about the group theory importance in the modern physics development and his deep consequences.<br><br>From first principles this book offers the perspective that there's not other way so simple to modelate de reality with so big consequences.<br><br>A must.