As Drianne wrote, the story is slightly more engaging, because Kostas has grown up and moved to Thessaloniki to study—and he falls in love!
Each of 12 chapters is followed by a (close, not "good") translation, quizzes on content and vocabulary, grammar summaries (here, more advanced verbs, plus adverbs) and extended vocabulary based on the story.
The authors are better grammar teachers than story tellers, but the idea for this series is good.