Yellow There! tominperu,
It's nearly impossible to find the holy grial of adult ELT courses/books/publishers etc....
I suggest you visit the publisher web sites
(Macmillan, Oxford University Press, Cambridge Unversity Press, Pearson ELT,Cengage Learning, MM Publications, Express Publishing, Marshall Cavandish etc....)
Each publisher website has loads of information and you can also look at the publisher's catalouge to look for books that could be useful to you and your students.