Fire brigade books for obsessed 6 year old

[minimisa]

Can anyone recommend any good fire brigade books for an obsessed 6 year old? They need to have lots of detail as he's already read all the 'People who help us' type ones. Thanks!

US Firefighter TJ Spencer has created a series of books about a firefighter called 'Nozzlehead' at nozzlehead.net/, so it should be quite realistic and detailed. For fun my website carries a free print-off colour-in picture of the 'Firehats' in a Fire-engine on their way to a rescue at www.hatpeopleofhatland.com