The bad news first. Forget the 30% discount. 
Now the good news…..It is 40% off and no promo code needed! Holy smokes!
From Syngress:
“Now through August 15th, Elsevier is offering 40% off all their books, including X-Ways Forensics Practitioners Guide (use this link: http://store.elsevier.com/product.jsp?isbn=9780124116054&_requestid=665676). No promo code needed. Just follow the link, add to your cart and save big”
The X-Ways Forensics Practitioner's Guide/2E 
woot!!! just ordered my copy..thank you both Brett and Eric! Question – will an ebook version also be available?
ebook is supposed to be out prior to the paper book.
So how do I order the ebook instead?
Damn – I bought this at full price last week!
Nothing says you can’t cancel your order and re-order 🙂