More books have been added to the Map Books of 2016 page: have a look. Some are available right now; others you’ll have to preorder. As usual, buying via this website helps support The Map Room.
I thought about doing a similar page listing map colouring books for adults, but it seems redundant when you can just refer to the colouring books tag (or the coloring books tag, if you’re going to be insistently American).