Here’s my Goodreads review of the book…

Three distinct sections in this reader, at different levels of difficulty.
1. Beginner French, with very simple grammar, but school vocabulary assumed. Progresses through the chapters. Not overly interesting.
2. History. Written in present tense. I enjoyed reading about the ancient history more than the modern. I had read some of these before in Roussy de Sales’s earlier publications, where these were separate books. Again, there is quite a bit of vocabulary here.
3. Famous short stories. These include perfect and imperfect tense, so grammatically suitable for the intermediate student. For some reason I don’t really enjoy these stories, though I think I understood more of them in my most recent reading than when I read them over 10 years ago in other editions.
There is still quite a vocabulary burden when reading these, so their suitability will depend on how comfortable people are with unknown words, and the size of their current vocabulary.

Further info on an extract of the text.

Chapter 1 is 87 words (tokens) and  43 distinct words (types), which makes a type-token ratio of 0.49, which is suitably low for beginners. This compares favourably with other beginner stories, like Bonjour Berthe, and Gnomeville Episodes 1 and 2, but is aimed at an older audience.

Chapter 1 gives a reasonable amount of repetition for de, est and il. Other words would need to be encountered more frequently to be acquired via reading.

In summary, it is good that these stories are still available, as they certainly have their place for French extensive reading.