Terry Pratchett - Jonny Maxwell trilogy

This incredibly funny trilogy starts with Only You Can Save Mankind in which Johnny Maxwell gets caught up in the ultimate fantasy (or nightmare) of the computer-mad child - as the game becomes real! In Johnny and the Dead Johnny makes the alarming discovery that he can actually see the dead. When the dead realize this they make use of his talents to prevent developers building on their graves. The final part, Johnny and the Bomb, sees Johnny and friends travelling back in time to 1941 (on a bag lady's shopping trolley!) and trying to warn people about a bomb that is about to drop.

Here there are books in rtf and in fb2. Choose what you prefer.

Pratchett - Johnny and the Bomb
Pratchett - Johnny And The Dead
Pratchett - Only You Can Save Mankind

rtf here  : 

fb2 here : 

Approved by Englishcology