Will these small errors get in the way of your Chinese language learning? Honestly, probably not. This book was originally written in French so, whilst very good, there will be some translation errors throughout. This book was hugely popular and very common among Europeans learning Chinese. I know, a strange place to start learning Chinese. The second volume includes additional 56 lessons and they follow active phase.
The first volume includes a total of 49 lessons and it follows passive phase of this course. These series consist of a total of lessons and they are divided into two volumes. One of the most popular series from Assimil for Mandarin learners is called Chinese with Ease.