This is the last book in Brandon Sanderson's middle school series, which has been delightful so far. Librarians are the enemy! You should really pick up the first one if you haven't read it Alzatraz versus the Evil Librarians.
There aren't any big release events, but Brandon will sign any of his books at signing events of which there are many for Wheel of Time and now his new series The Stormlight Archives.
There have also been reports that copies can already be found in select stores so call ahead if you go out looking for it today.