When Inspector Kit was just a little kitty, she desperately wanted to be a spy - jetting off to foreign countries, thwarting international diamond thieves.

And now the big day has arrived - her very first mission. And it's rather disappointing. This was not she had in mind - a grubby room somewhere in America.

The room's seen better days for sure - there's not even a stunning view to compensate. The first window shows a brick wall, the second a dead-end street and the third a bit of sky with the top of a billboard.

As for lasers, codebooks and electronic forcefields, forget it. There's a very old map of America and a flipchart with an impressive obscene doodle on it.

In the corner, there's a dusty bookcase with a few old books falling to bits - no-one has touched them for years.  

The extremely promising selection is The Life History of the Louse (with pictures-1974 edition), Chart-Topping Hits (1977 edition), How To Keep Your Hamster Happy (1976 edition), Fun and Easy Codes for Kids (mouldy cover only).  

Joining them on the shelf are a few rusty staples, some bits of old string and half a dozen drawing pins. 

And the mission instructions on a piece of paper torn from the flipchart. 

> 
> NUMBER 1 MISSION.  
> 
>  Find the state that the bomb has been planted in - X marks the spot.
> 
> 
> 60659-11160-81874-41475
> 
> 
> 

That's all there is. Apart from a coffee stain. And another obscene doodle.

This spying lark isn't so glamorous as it seems. But the problem has to be solved...