Does anyone know how to reach Thomas Lindgren, who wrote the 1990 book "Glory and Failure" about Babbage and others who built difference engines? -- [image: NJIT logo] <https://www.njit.edu/> *Evan A Koblentz* Staff Writer Office of Strategic Communications evank@njit.edu (973) 596-3065 <9735963065> https://web.njit.edu/~evank/ @TechnicallyEvan