Heavily uses illustrations to help students understand situational scenarios at a glance without relying on translation.

If your budget is truly zero, you cannot get a legal full PDF. However, you can access the spirit of Dekiru Nihongo (task-based, authentic learning) for free through these alternatives:

The publishers provide several official PDF supplements to assist learners and teachers: Vocabulary Translations

Encourages learners to move from single sentences to "clusters" and full paragraphs early on, developing cohesive storytelling skills.

When searching for the PDF, you will typically encounter two main volumes in the series. Understanding the difference is crucial for choosing the right level.