What was the subject of author Lansing Lamont's book entitled 'Day of Trinity'?

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On Monday morning July 16, 1945, the world was changed forever when the first atomic bomb was tested in an isolated area of the New Mexico desert. Conducted in the final month of World War II by the top-secret Manhattan Engineer District, this test was code named Trinity.... According to Lansing Lamont in his 1965 book Day of Trinity, life at Trinity could at times be very exciting. One afternoon while scientists were busily setting up test instruments in the desert, the tail gunner of a low flying B-29 bomber spotted some grazing antelopes and opened up with his twin .50-caliber machine guns. "A dozen scientists, ... under the plane and out of the gunner's line of vision, dropped their instruments and hugged the ground in terror as the bullets thudded about them."[5] Later a number of these scientists threatened to quit the project. http://www.cddc.vt.edu/host/atomic/trinity/trinity1.html May 16 10, 10:44 PM