I've noticed that if you're already logged in to Moodle, clicking on the links in this blog works fine. If, on the other hand, you're not logged in, Moodle kindly asks you to enter your username and password and then takes you to some general Moodle landing page . . . forgetting what you came there for. If that happens, it seems to work for me to just back up to the blog and try the reading link again.