The linked sites below are free PDF files with fullly indexed and hyperlinked texts.
These files are stored on Dropbox. You can view them without a Dropbox
app running on your system, but some people have told me they cannot view
them on a mobile device. Installing Dropbox might help.
A free Dropbox app is available
for both Android and Apple iOS systems.
Let me know if you have comments or suggestions, including other recipes that you think are good.