For example a book  with a lot of grit it could be "The Enigma" by Andrew Hodges, when alan turing try to brake enigma , but he cant he and his partners try harder, they try to make a machine that broke enigma but the machine dont decifrate enigma becausa there was miilions of posibilities so they star thinking how they the machine dont have to analyze all the posibilities so when they know how to do that the machine finaly work so they broke enigma with the cration of Alan Turing, but it was not easy and they have a lot of obsatacles but they with grit finaly do it  6 3