Step 1:Install Mozilla Firefox browser
Step 2:Then using Firefox, go to this link to install the 'Print pages to PDF' add-on.
Step 3:Now browse to your Pinterest board using Firefox browser.
Step 4:Now in the browser window top bar, go to 'Tools' > 'Print to PDF'
Select 'Print active tab' (The add-on also gives you an option to print all open tabs) You're done! Check your freshly saved PDF e-book! Please note that the add-on prints as much of the page that is loaded. So you need to first scroll down to load as many pins as you want and then proceed to Step 4 above.