A free eBook in pre-release on Acceptance Testing, and comments are being collected. You can use the voucher code 91YmqbaAzuEu all of this month to download a free copy.
Go to the book’s blog page at http://baddotrobot.com/book for more info or use the voucher directly on the Leanpub book page to download https://leanpub.com/essential_acceptance_testing
And on the Technical Topic of Testing, here are some free eBooks on Testing. http://www.ministryoftesting.com/resources/ebooks/
(3) 50 % off a Manning Book on BDD
Go there just for the free Intro chapter