I found the Orthoganal trilogy brilliant as an experiment in character development, and extending &quot;alternate realities&quot; about as far as they can be extended, but they aren&#x27;t as engaging as most of his other books (IMO).<p>I think this is more due to the fact that humans like reading about characters they can easily relate to, and Egan <i>really</i> pushes this boundary!<p>Still worth a read, and I&#x27;ll almost certainly re-read them in the future.