I already pre-ordered C# 6.0 in a Nutshell.
Am I eligible to purchase Early Release eBook for $4.99?
Help get this topic noticed by sharing it on Twitter, Facebook, or email.
The ebook upgrade discount on our website isn't activated until the print book comes out. If you'll call our customer service folks here, they can probably give you that upgrade discount, however. You can reach them at 800.889.8969 or 707.827.7019
O'Reilly Book Support