For those who still prefer printed books, you may print the guides for personal use.
Some pages in our guides, however, may not be print friendly.
To remedy this, you may invert the colors for reading and printing.
Using Adobe Reader you should be able to invert the colors in settings.
Get it here if you don't have it yet: Adobe Reader
It's free to download and use.
Step 1: Open the guide in Adobe Reader
Step 2: Click on "Adobe Reader" on the top menu of a Mac (or "Edit" in Windows)
Step 3: Click Preferences. It will open the Preferences window.
Step 4: On the left sidebar, choose Accessibility.
On the window to the right, you'll see the option to change document colors.
You can set the background to white and black for the text.
Important: There are two tick boxes in there, make sure they're unchecked otherwise you may not see the text.
Your document should show a white on black view. You can proceed with printing after that.