The Fourth Bomb is a 1942 detective novel by John Rhode, the pen name of the British writer Cecil Street.

[1][2] It is the thirty sixth in his long-running series of novels featuring Lancelot Priestley, a Golden Age armchair detective.

[3] In The Observer Maurice Richardson wrote "Inspector Waghorn does the investigating, but the evidence is so contradictory and suspicion so widely distributed that the solution calls for Dr. Priestley, whom, you will be sorry to hear, I thought was looking alarmingly shaky.

Sound recommendation, of course" while Isaac Anderson in the New York Times wrote "It is merely the familiar Dr. Priestley formula set against the background of wartime England."

At the height of the Second World War, a German air raid sees four bombs dropped on the English village of Yardley Green.