Tenma is happily minding his own business, getting ready to kick off the Winter break by playing video games with his sister, when he is transported into another world! It doesn't take him too long to realize he's now in the same world as the video game he was planning on wasting his holidays playing...

Eternia Dragons is a book series designed for English language learners to get more confidence in their reading ability. Each book is designed to have easier and plainer language than is common in fantasy writing, without sacrificing the types of stories and scenarios that make that genre enjoying to read. Each book is a length that is long enough to feel "like a book" without being overwhelming. It aims to be a mix of short and easy enough that ESL and EFL learners won't be discouraged, while still having content engaging enough to keep them reading.

This edition is published by Marini and contains a Japanese afterward.

In The Deadly Dungeon, Tenma wakes up in this new world, and quickly realizes that it's the same one as in his favorite video game, Eternia Dragons. But this world seems different from the one he remembers in the game. He needs to find his sister, Emma (who he suspects was also brought along with him), but before that he needs to figure out where he is and how to escape.

Luckily for him, it doesn't take him long to run into somebody who might help him out. Unluckily, it looks like she's a goblin? And she doesn't seem too happy with the idea of working together with a human...