If you buy (or already have) the Kindle ebook
The Success Principles - 10th Anniversary Edition by Jack Canfield, you can buy the Whispersync companion for only $3.99. The Kindle ebook is on sale for $1.99 right now, so the total for the whole enchilada--audio + ebook + Whispersyncing--is only
$5.98!
FYI--this 10th anniversary edition is not just the text of a previous edition reprinted for the occasion. There are 100 pages of new material, including a section "Success in the Digital Age."
In case you're not familiar with the book, it is a modern classic. And it's been extremely highly-regarded; this edition continues that tradition with a 5-star rating, from 124 reviews at the present time.
This edition is 624 pages long, which translates into 21 hours and 11 minutes of audio playing time! I look at price-per-hour of listening time as a measure (along with other things, of course) of whether or not an audiobook is a good enough value to spend my hard-earned dollars on--this one has got to be one of the best Whispersync audio companion deals by that measure that I've ever posted.
Oh, if you decide that you just want the audio, you can get that
at Audible for only (ha) $38.74.
You can get the whole Whispersync companion deal by starting
right here, at the Amazon webpage for the ebook.