I think there were 3 porgrammers who live in our universe but have the ability to cross to an alternate universe where magic exists. They use their knowledge as programmers to write spells like the would code. These spells are carried out by their little programs which appear to sometimes be represented by little goblin workers or something..
There is one point in one of the books where I remember one of them writing this advanced spell for making laundry detergent which would clean anything.. and some ninja like assassin was sneaking up behind him to attack but slips into the detergent and slides down the hall and down the stairs and out the castle

I think that one of the books had an image of an F-14 tomcat being chased by a dragon.
anyone know the book I'm talking about?