I always wonder about tie in novels, interesting to hear from someone who's been directly involved. Quickreaver posted a very useful and informative podcast about utilising all publishing methods to their best effect by an author who has done just that - sucessfully published with a 'proper' publisher but got a contract which allowed them to e-publish and make quite a lot of money doing so.

Clearly if we authors want to publish and get paid, good legal advice is pretty essential!