Nursery Rhymes used by Agatha Christie for the titles of some of her novels.

Agatha Christiehttp://sanchezbenedito.blogspot.com.es/2013/05/agatha-christie-her-life-and-her-work.html, 'the Queen of Crime', whose novels have sold by the billions, both in Great Britain and the rest of the world, was very fond of Nursery Rhymes, and she sometimes chose a verse from one of them for the title of one of her novels. Here are some examples:

Hickory Dickory Dock

Hickory, dickory, dock,
The mouse ran up the clock.
    The clock struck one,
    The mouse ran down,
Hickory, dickory, dock.

Note: It seems that it was first used by children as a counting-out rhyme, and later, to decide who was to begin a game. 

Crooked House

There was a crooked man, and he walked a crooked mile,
He found a crooked sixpence against a crooked stile;
He bought a crooked cat, which caught a crooked mouse,
And they all lived together in a little crooked house.

And Then There Were None

Ten little nigger boys went out to dine;
One choked his little self, and then there were nine.

Nine little nigger boys sat up very late;
One overslept himself, and then there were eight.

Eight little nigger boys travelling in Devon;
One said he'd stay there, and then there were seven.

Seven little nigger boys chopping up sticks;
One chopped himself in half, and then there were six.

Six little nigger boys playing with a hive;
A bumble-bee stung one, and then there were five.

Five little nigger boys going in for law; 
One got in chancery, and then there were four.

Four little nigger boys going out to sea;
A red herring swallowed one, and then there were three.

Three little nigger boys walking in the Zoo;
A big bear hugged one, and then there were two.

Two little nigger boys sitting in the sun;
One got frizzled up, and then there was one.

One little nigger boy living all alone;
He got married, and then there were none.

One, Two, Buckle my Shoe

One, two,
Buckle my shoe;
Three, four,
Knock at the door;
Five, six,
Pick up sticks.
Seven, eight,
Lay them straight;
Nine, ten,
A big fat hen;
Eleven, twelve,
Dig and delve:
Thirteen, fourteen,
Maids a-courting;
Fifteen, sixteen,
Maids in the kitchen;
Seventeen, eighteen,
Maids in waiting;
Nineteen, twenty,
My plate's empty.

Five Little Pigs

This little pig went to market,
This little pig stayed at home,
This little pig had roast beef,
This little pig had none,
And this little pig cried, Wee-wee-wee-wee-wee,
I can't find my way home.