Note: These instructions may change (or be improved) over time as tools evolve and I get more detailed feedback from different users.
As a general rule of thumb, using the free Firefox browser is the easiest and best way to get and view YEAH.PDF on all platforms. The only easier way is on Windows if you have it configured to use Adobe Reader to read PDF files by default, in which case you can download YEAH.PDF in any browser and then read it well with Adobe Reader.
Windows: Microsoft Edge
Tap the link on my home page to download YEAH.PDF. Instead of tapping clicking Open, tap the Show in Folder icon. When you see the folder in File Explorer, right-click YEAH.PDF and select the Open With option. Select your free Adobe reader (see the home page if you don't have it already). YEAH.PDF should come up. In the future, you should be able to just launch the Adobe Reader without having to download the file again -- simply select YEAH.PDF from the most recently used files, or if it has been a while, select it using the File Open dialog box when you tell Adobe Reader to open a file.
Windows: Google Chrome
Tap the link on my home page to download YEAH.PDF. When the book appears, tap the Download icon and determine where you want to store it on your PC. Launch your free Adobe reader (see the home page if you don't have it already). Select YEAH.PDF from the location where you stored it. In the future, you should be able to just launch the Adobe Reader without having to download the file again -- simply select YEAH.PDF from the most recently used files, or if it has been a while, select its location via a File Open dialog box when you tell Adobe Reader to open a file.
Windows: Firefox
Tap the link on my home page to download YEAH.PDF. When the book appears, click the Download icon and determine where you want to store it on your PC. You can start reading it immediately. You can later press Ctrl-O to reload it from the location where you stored it without having to download it again.
Android: FireFox
Tap the link on my home page to download YEAH.PDF. You will get a prompt asking if you want to leave Firefox to view the content. Tap CANCEL. YEAH.PDF will appear on the screen when the download is complete. You can click the Download icon to make the file available on your local device so that you don't have to reload it from cstephenyoung.com every time you want to read it.
Android: Other Browsers
Tap the link on my home page to download YEAH.PDF using your current browser.
If the document appears automatically (it can take a little while to download), do not attempt to use the book immediately, as it will probably not work correctly in your browser. Instead, tap the "3 dots" icon and select Download. The screen may not show any evidence that the file is downloading and it may or may not give you a confirmation that the download is complete. You can then launch the Xodo app, which should show you a list of files you can use, including the newly downloaded YEAH.PDF. Select YEAH.PDF and enjoy it! In the future, you can skip the other steps and just launch Xodo and select YEAH.PDF, even if you don't have a live internet connection.
If you're given a choice, select the choice to download it rather than open it. Then either (1) Navigate to YEAH.PDF stored on your device and tell your phone to open it with Xodo, or (2) Launch Xodo and open the stored file from within Xodo.
iPhone: Safari
Tap the link on my home page to download YEAH.PDF. Once your file is downloaded, it will be available in your Downloads collection, though this may be auto-deleted after a day or other fixed time period. Use your device's file management to copy it to your Files app in the location of your choice. Then launch the Xodo app and open the file from the location you determined. Just using Safari to read YEAH.PDF is not a good option.
iPhone: Firefox
Tap the link on my home page to download YEAH.PDF. Once your file is downloaded, it will be available in your Downloads collection. You may or may not get a confirmation when it is done. Use Firefox to read YEAH.PDF.