Author Tobias Buckell is in the hospital, currently being diagnosed for what he thinks is some sort of heart problem (his family has a history of hypertrophiccardiomyopathy, so he thinks that may be the problem).
Based on his blog post, he’s resting as comfortably as can be expected, and undergoing tests. He seems to be updating fairly regularly, so for the latest news, the best bet is to read his blog.