This is good. Each story has multiple short chapters (a few pages), and each of those chapters has a table of key words with their translations, and a few quiz questions where the questions and answers are both in Japanese.
For common kanji, chapters will use furigana for their first occurrence. So if you are going along and forget the reading of a kanji you can skim back to when it was previously used, this is really good for learning and building the skill of kanji recognition.
Other story collections either use furigana all the way (so you don't get forced to learn the kanji), or have no kanji at all (I saw this on a beginners book once, and I have no idea who thought that was a good idea).
The first story is interesting, and there is clearly a lot of care put in to use just enough repetition of phrases with variations to keep it interesting but also to let new words sink in.