I posted a book suggestion in the "Suggestions" forum today. I then thought, surely this isn't the best way to show Logos how interested we customers are in a book. So, I created a uservoice forum where we can all list, and vote for, the books we want to see in Logos. So, feel free to go, add books, and vote for what you want to see. It may just work: http://bookswewant.uservoice.com/forums/160544-general
Note: I don't work for Logos. The site I'm linking to isn't run by Logos. Logos might not like my idea and ask me to shut it down. Logos might take down this forum post. I'm cool with all that. I'm just a guy who likes Logos and wants to see more and more great resources added. This is my attempt to help. If it isn't helpful, just let me know.