De Administrando Imperio is a fascinating, unique work, that is hard to clasify within any conventional genre. What it is is a set of foreign policy rules, approaches, tricks and case-studies for the Emperor Constantine VII Porphyrogenitus's son Romanos (II) packaged together with ethnography, history, and geography. One thing that grounds that lofty ambition is the constant feeling that this really is a dad trying his best to get his son to listen to him on some very important issues. It is especially a fascinating read in that it allows one to take a look at the source of so many Balkan nationalist myths and insanities, because a lot of them can actually be sourced back to this works treatment of Balkan origins (surprisingly not the Bulgarians though, and somewhat less surprisingly there is little mention of Albanians). It is also immensely charming in its incidental advice on how best to lie about why you can't gift certain things (claiming Constantine the Great cursed them with a long backstory is the prefered way), its explanation of a long running Istanbul property dispute (we have all been there) in the midst of a diplomatic roll call of the princes of Taron, and its opinions on the Emperor's personal galley. The extended discussions of pedigree and geography can get tedentious (yet is immensely helpful to a specialist) so feel free to skip these on a casual read. Also important to note is that the critical apparatus for the texts is in a seperate volume, so keep that handy during a read to not get lost! In order to get a fuller view, also look into the De Thematibus, also by the Porphyrogenitus, which takes the historical and geographical scope here into the internal lands of the Empire (especially interesting if you are Turkish, as that work covers most of Anatolia in detail).