The New Empire of Diocletian and Constantine By Timothy D. Barnes
Useful, but only in the strictly academic sense. This isn't a book you can like or dislike. It's more of a reference work, containing lists, chronologies, and other prosopographical notes regarding the period AD 284-337 from the reign of Diocletian and the various incarnations of the imperial college through the death of Constantine. 324 Very useful book. 324
The New Empire of Diocletian and Constantine