Even if you find a PDF, it is rarely "BETTER." You will likely get:

Netzwerk Neu is a modern German textbook series for young adults and adults, leading from A1 to B1. The series is published by Klett Langenscheidt, a leading German educational publisher.

The B1 Arbeitsbuch (workbook) complements the coursebook. It contains:

The keyword "BETTER" likely refers to one of two things:

A PDF allows offline access on tablets and phones, plus the ability to zoom, annotate, and print pages.