Hello James
I hope you are doing well and I apologize for the trouble downloading the eBook.
To access your eBooks, please follow these instructions:

• Go to this page: https://rntlab.com/courses/
• Then, open the course pages and download the eBook

You can also open these direct link:

• https://rntlab.com/module-1/course-intro-arduino-projects/
• In that page, you’ll be able to download all the eBooks that you bought

Thanks for your patience.
Regards,