Terry Pratchett The Nomes Collection 3 Books Set (The Bromeliad Trilogy)
Description

Truckers 
Imagine that all around you; hidden from sight; there are thousands of tiny people They are four inches tall; brave; stubborn and resourceful They are the nomes. The nomes in this story live under the floorboards of a large Department Store and have never been Outside. In fact; they
dont even believe in Outside. But new nomes arrive;
from where else and they bring with them terrifying news: the Store is closing down and Everything Must Go
. . .The fantastically funny first book of the nomes; from the author of the bestselling Discworld series.

Diggers
This is the story of Jekub; the Dragon in the Hill with great big teeth and a great loud voice. Well;
thats according to the nomes; but they are only four inches tall. When humans threaten their new home in the quarry; the natural thing would be to run and hide. But the nomes have got
the wild idea that they should fight back. After all; everyone knows that nomes are faster and smarter than humans; and now they have a secret weapon

Wings
When you re four inches high in a world full of giant people; things never go very well for long. After running into trouble at the quarry; the nomes want to go home. The problem is; home is somewhere up in the stars; in some sort of Ship.
Masklin must find a way to get to the launch of a communications satellite (whatever that is). And so begins an incredible journey; filled with peril; planes; honking geese . . . and a walking sandwich