Trans-Mississippi unit reference books

Jane aka "The Trans-Mississippian" just posted a short piece [here] about three of her favorite reference guides to military units raised by states located west of the big river.  I fully concur with her thoughts on their scholarly value and the need for more books of this type.  We do have the Sifakis series, but new volumes with the authority of those mentioned in Jane's post would be very welcome indeed.