You might want to try starting with a good interpretation of Deleuze's project before diving into his own work. Getting someone's idea of the "big picture"--even if it's one you end up disagreeing with--can save you a lot of angst and floundering and painstakingly underlining damned near every friggin' word of Difference & Repetition in hopes that something will stick sooner or later. (I did that. I admit it. Didn't work.)
At any rate, given your interest in epistemology, Gregg Lambert's In Search of a New Image of Thought: Gilles Deleuze and Philosophical Expressionism might be really useful. Judge for yourself. Here's a link to the Amazon page:
I do not know if this will have any relation to techno-anthropology, but The War Machines covers Deleuze's concepts of War Machines and Territories pretty well in its introduction, and then uses the concepts as a framework for the ethnography.
You could try the Introduction to Schizoanalysis by Holland I havent read it myself yet (skimmed through) but I think its pretty helpful. amazon.com