Received e-mail lists several titles as free to Prime customers but when I try to obtain quotes me a price, any information.
Are you accessing the available titles through the email or directly on the book's product page? In the event there's some glitch in the most recent email, have to tried obtaining the book via the original First Read email from the beginning of June? (If not currently in your Inbox, there's a copy of the email in the Message Centre of Your Account.) Are you in the UK, and logged into the Amazon account with the Prime membership on amazon.co.uk?