When you are viewing the ebook online, you can save parts of it in PDF format. You can then use the part that you saved offline. The PDF file does not expire.
You have two options for saving as PDF:
To create a PDF and save it to your computer or a flash drive, click the Save Pages link.
To email a PDF to yourself, click the Email Pages link.
When you use the "print" or "email" functions, you will see there is a limit on how many pages you can use at once. For most ebooks, the limit is 100 pages, but some books may allow as little as three pages.
Very often the limit is enough to print the chapter you are currently viewing (see the This section option).
What if you want to save more than the limit being displayed? First, save as much as you can. Then close your browser and come back to the database after 20-30 minutes, and you will find that the limit has been reset.