Ok >>5 here again.
I went to ABe's blog to see if he had info on them and sure enough there was(Don't know why I didn't think of that before).
Color/Monochrome is an art/sketch book, just as you would think from the title. It will have "25 color illustrations 56 pages illustrated".
Isolated City sounds like it's story he is working on(maybe for a later manga?) but this book "is a collection of character sketches for set and stage" but it also includes "Short stories are included in the form of scenarios."