Floodgate (1983) - Authored by Alistair Maclean - Irish terrorists threatening the Netherlands with water

Alistair MacLean is a Scottish writer who specialized in writing thrillers and crime stories. He was third son of a Scottish minister and joined the Royal Navy during the world war two. He was a senior torpedo operator at the height of his career. He was in the thick of the war theater during the world war and saw action on many fronts especially the arctic north. After retiring he started penning his novels based on the war he saw and many of them became best sellers. MacLean never looked back as a writer until his death in 1987.
Floodgate is the second book of Alistair MacLean to be set in Holland. The first was puppet on the chain which dealt with the Netherlands underground drug mafia. He brings in the familiar detective Peter van Effen who continues his sleuthing in this book.
Schipol airport in Amsterdam is flooded and the planes are floating around aimlessly. The dykes which kept the north sea out has been breached and the sea has devoured Schipol completely and the authorities are completely baffled. Peter Van Effen, the detective par excellence is brought in by the authorities. Soon FFF, an Irish Liberation force calls in claiming responsibility and threatens to carry on more strikes against the dykes. This pours in the panic as a breach through the dykes would submerge Holland completely under water.



Van Effen goes in to action and checks in all the employees of the airport. He suspects informants among the staff would have helped the terrorist. In the mean time the terrorist have acquired nuclear weapons and threaten to detonate them in the sea triggering a tsunami to submerge Holland.
He is ably assisted by beautiful assistant Annemarie Meijer, an heiress to a large fortune and other beautiful women. Van Effen is very close with to the dreaded underground gang the Krakers and enlist their help to combat the terrorist. Soon the game starts to outwit the terrorists. The FFF has to be stopped for the interest of Holland.
Soon the action hottens up with Agnelli the head of the Krakers gang along with his brothers infiltrate the gang and pass on information to Van Effen. Soon many operatives like Anne Marie and Marie are captured and held for ransom. The leader of the terrorist Samuelson is supposedly an earl who is motivated by revenge for the killing of his sons. Sometimes you feel that MacLean just awakens sympathies for his character even when he planning in human ways to kill.
But the ultimate action is ingenious, although a little tame for such a grand operation. Van Effen successfully gases all the terrorist unconscious and arrest all of them and rescue the hostages. Anne Marie and he predictably fall in love with each other and walk in to the sunset.
This may not be MacLean's best books of the time but the plot is the winner. A very cleverly thought out action plan with with a tame ending is Floodgate. Still I would recommend it for its sheer clever storyline from MacLean.