Chapters 11 to 15 are up.
Thank you - a great pleasure doing business with you ?
A suggestion - I looked at the PDF as well - on the very first page (title) it says Programming with B4X - perhaps consider adding a line below that which indicates that its with special reference to B4j - your learners will know this but others might need to know which tool accessory to the course to install / use. You may have that in later pages but on the title page it would be useful immediate information. I just noted, on page 1 very bottom it says
Installing B4X - the link is for B4j - perhaps consider that the sub-heading says
Installing B4X - B4j package haven't looked any further.
Whether you rely on readers going to the B4X site via the linking on that page is fine. But, perhaps consider adding a line below the above sub-heading just explaining that the course uses the B4j programing tool which is mainly aimed at Desktop applications as a good tool for general teaching.
Thanks for all that you are doing for the community - much appreciated.