Teachers: Need help with new software/book for EFL

Hi,

I'm just launching a new EFL reading software and textbook package called Costello: Quest-based Learning and need help from both teachers and students to let me know if it is effective and interesting.

I was a teacher in Japan until April and used an online version of the software, but the book/offline version is completely new. The software is based on a text-based adventure game (MUD) and has been carefully integrated with tasks in the student book. This is a commercial package but as a teacher I want to make something that can be genuinely useful to teachers and students and so would love to hear how it can be changed and improved.
More information on the website and sample editions to any teacher who is willing to help (send me the sample edition form on the website).

Website: http://costellopublications.com

Many thanks!