The book "Formal Concept Analysis -- Mathematical Foundations" is to receive a second, expanded edition. A first version is available, and it would help me if some colleagues could look at it and let me know what they think. It's not just about typos or math errors. You are also welcome to check whether your contributions have been taken into account and are cited correctly. If you are interested, please e-mail me to bernhard.ganter(a)tu-dresden.de In coordination with the publisher, I will then send you a personalized pdf and hope for your feedback. Kind regards, Bernhard Ganter