Our work is trying to reach as many humans as possible and we try to provide good, free informations for everyone. Therefor it helps us, to know which exercise is well percieved and which format ist good and which is not.We know that in counting how often a file has been downloaded. This is the only way to grow and get better as an individual or an organisation.In addition we think, communication in both directins is very important for the evolutionary process. Therefor the free files can only be downloaded after logging in. We think that is more than fair and pointing to success. We promise to not spam and not selling the addresses to anyone. We just need them for our rare newsletter.