I have published a series of eBooks in English, French and Spanish, from the modules of my book "Practical Revenue Management in Passenger Transportation".
On Amazon.com, search "Gary Parker Revenue Management". If you have a Kindle Unlimited subscription from Amazon, you can get these modules free.
Here is a list of some of my publications that are available for purchase from Amazon.com or from me directly. You can scroll down in the window. Contact me if any are of interest to you.