Mandarin Companion has published a collection of graded Chinese readings which there are adaptations of great classics of world's literature.
The key point of this series of books is to approach interesting readings with absorbing plots which allow readers into a "extensive" reading. In other words, readers must understand 98% of the words so that they can enjoy the book and at the same time the experience turns into a motivation to keep studying and they get good reading habits.
This type of readings allow students to observe vocabulary in different contexts , learn different meanings of the words, review grammatical structures etc.
Journey to the Center of the Earth is the adaptation of the famous novel by Jules Verne
The book belongs to level 2 of the series (450 characters) recommended for a intermediate level, it is targeted to students who are preparing HSK 4 or using New Practical Chinese Reader 4.