I don't work with Flash, but I can recommend the great hands-on training series of lynda/lynda.com.
They have a new book on Flash.
Printed on good paper, good graphics design, step-by-step and task oriented approach.
Unlike this book, many software training books, especially about graphics applications, are printed on cheap paper, and their graphics are horrible. I don't know why they do it, but some publishers seem to think, only those, who can wade through the seven circles of design hell are worthy of using a piece software.
PS: Lynda.com has a big library of video tutorials, that you can view when signing up as a subscriber. As with all things well done, it's not cheap.