My Screwtape Letters series has been completely reformatted to provide full functionality on desktops, tablets and smart phones. That includes the color-coded text to make it easier to differentiate various aspects of the pages, such as who is speaking, questions, suggested study areas, Etc.
The ability to collapse / expand the discussion hints is also fully functional on all devices. including smart phones.
In the process, it’s been significantly enhanced to display much faster.
It’s also still free.
You can go to the Introduction here.
God in this life and the next 