In fact, teaching Upasika Kee live like Ajahn Chah, however, it uses a lot comparison (simile), which makes reading and understanding of his teachings easy (It is the practice is difficult !! ...).
A commentator on amazon.com in English, said she often repeats. I totally agree. But I see nothing negative, rather, it presents the teaching different angles which improves all the more understanding.
To give you an idea of Upasika Kee before buying, some texts circulating on the Web in English and French, free of charge, in PDF format: "Knowing Unentangled" and another beautiful text translated by Jeanne Schut, "Knowing how to read our spirit. "
Finally, another favorite, "Reflections On A Mountain Lake" Tenzin Palmo.