Vote is up here: http://goo.gl/forms/zTs9ogfvj7
I’m a bit late this month so I’ll announce the winner on May 2nd, giving everyone the weekend to vote on this.
This month’s topic is narrative and writing:
Character Development and Storytelling for Games by Lee Sheldon
Professional Techniques for Video Game Writing by Wendy Despain
The Writer’s Journey by Christopher Vogler
Hamlet’s Hitpoints by Robin D. Laws
Quests: Design, Theory, and History in Games and Narrative by Jeff Howard
(Keep in mind that some of these do not have ebook versions, and some have older editions that may be cheaper for you to access).