For those of you who attended the webinar I posted (Thank you again, by the way!), I promised to post up the sheet metal book with the ISBN number one of the attendees was kind enough to share (thank you, I'm sorry, but I don't remember who it was!).
Here's a link to the book on Amazon.com here.
It doesn't look like there's been an update, but the basics are the same, and I've always personally, like the material that Travis Jones and Neil Munro have created (I've been fortunate enough to watch them both present at different times).
I hope everyone finds this helpful!