The summer's day in question is the 24 hours of one June 26, as endured by a police department in the north of England. This masterful police procedural is more convincing than those of Joseph Wambaugh--because the events of June 26 are all too terribly believable.
John William Wainwright was a rear gunner in World War II, after which he spent twenty years as a policeman in Yorkshire. He wrote eighty crime novels between 1965 and 1992, sometimes under the pseudonym 'Jack Ripley'. He also wrote some short stories (mostly uncollected in book format), 7 radio plays, and an indefinite amount of magazine articles and newspaper columns.
this book was interesting in that it was set in England, with all the differences of expressions, such as 'bobbying' for police work. Also, it takes place in a 24 hour span telling which policemen are involved in which incidents. the serious one is that two members of the force have the unlucky experience of having a small bomb go off, with less than lethal consequence.