It took me most of the day, but I have the info for those of you who would like to download Master of Shadows from the Penguin USA site in Adobe format to be read on your computer.
The Adobe format of my e-book does require a different program than Adobe Reader to be installed on your computer before you try to download the e-book (if you've already tried and it doesn't work, like me, you can also install the program after and do a download again from the links in your Penguin Smart Receipt page.) The name of the program is Adobe Digital Editions, and it can be downloaded for free here.
If you are not already registered with Adobe as a member, you will also need to go here to creat an ID and password. After it has downloaded, Adobe Digital Editions prompts you for an Adobe ID and password, which must be entered for activation of the program.
I have successfully downloaded two Adobe e-books from the Penguin USA site to make sure it works, and both my e-book and another author's came through fine.
(Thanks to Dunabit/Lyn for bringing this to my attention.)