Arthur C. Clarke’s chunky book Greetings, Carbon-Based Bipeds!: Collected Essays, 1934-1998, now on Archive.org in open PDF. Not a great scan, but you can see what you would get if you were to pick up the hardback for $8 used on Amazon. It appears there is no ebook edition other than this Archive.org scan, at least in the UK.

The book opens with an essay on Dunsany, and also includes a “Tribute to Robert Bloch”, “Save the Giant Squid!”, and a short survey of fierce gay warlords and generals in history.