Hush is a twelve issue storyline that runs from Batman #'s 608-619, and is written by Jeph Loeb and illustrated by Jim Lee.
Both hoopla and Comixology Unlimited require memberships. For hoopla you need a library card as it works in conjunction with library systems around the country. It’s come to my attention that hoopla isn’t available for all libraries so you may want to research the libraries in your area to see if they are partnered with hoopla. If they are and once you’ve acquired a library card from them, then download the hoopla app, follow the instructions in making an account and you’re all set! You can check out quite a few things at a given time.
Comixology Unlimited is a feature of the Comixology app that allows you unlimited access to comics from several different publishers including DC Comics. You can start Comixology Unlimited with a free one month long trial. After that, it’s 5.99 a month.