----- I am not an ESL teacher anymore -----
I don't know a teaching book like this (neither have I worked with Landmark Advanced), but I recommend you to extract texts from "The General Book of Ignorance" ( http://www.usingenglish.com/forum/ge...english-6.html ). The texts are short (you can work each of them in one or two classes) and are advanced, with many new words. Although I read the American version, the original one is from the UK.
If you want to work reading you may try an audio book. There are many classic texts recorded in audio in Internet (thinks like Moby-Dick, etc.). If you find an easy to get and free audio book on short stories, please let me know.