Bilingual one is heavily furigana'ed, e.g. in these two lines from the opening of one of the stories, every kanji word has furigana.
「わたし、寝たくないの」
駄々っ子のよう嫌々をしながら、美都子がいう。
The stories are a mix of modern short fiction aimed at adults but they have been picked to give a range of styles.
The blood-type one has pretty much zero furigana, here's a random sample from the start of one of many chapters:
とにかく好奇心が旺盛。やりたい仕事を次々見つけてくるのがB型の表キャラです。どこからビビッと天啓を受信したら、電光石火の早業でやりたい仕事に向かってアクションを起こすでしょう。
I'm going to be away on holiday from this Saturday so things might not get sent out until April.