The first book is titled Quantum Devil Saga: Avatar Tuner. It will release in hardcover for $24.99, trade paperback for $14.99, and in eBook format for the Kindle at $9.99.
The book has been translated by Kevin Frane and there is a sample of the first chapter available here for free, if you're curious. You can also check out an interview with Kevin here. I can say I've been leafing through an advance copy of the first book, and I recommend picking it up if you're a hardcore MegaTen fan like me.