I have never written any Go code but I got the following email from Packt.

Hi [...],

I am [...], Acquisition Editor at Packt.

We would like to discuss with you regarding an opportunity to publish with us a book 'Go Standard Library Cookbook'. This book aims take you through the power of the language by taking you through recipes that will teach you how to take functionality from the standard library to implement a particular solution.

I understand that you are one of the contributors on Golang and think that you are a potential match to author this book for us.

We look forward to discuss with you the further details of this endeavor, kindly do let us know your thoughts on this proposal.

I look forward to hearing from you.

Regards,
[...]