You pay if you want! (free possible)
The money collected is used for the operation of the association. Thank you in advance.
You can download the digital book below in four different formats. My favourite one is the ePub format that can be read on a mobile device. It requires you to add an application on your mobile that can read the ePub format. There are several of them, I recommend an efficient ePub player with the ePub3 format (some applications can only read ePub2) :
– on mobile Android : Lithium
– on iPhone : Apple books