I first came across this book 50 years ago in my 6th year at Secondary school. Having got my act together and studied a bit to pass what was then known as 'Higher French' our teacher gave me this book to read as a reward for my sudden progress.
I never quite finished it, but went on to do Russian and other languages, recently coming back to French after a holiday. Mindful of the book, I searched it out and was delighted to find I could still remember what I'd learned.
It has been a great joy to finish. Much to be recommended.