@wildmandrake@philosophy It's ten classic and very influential books. I wouldn't rank Ayer's book up with the rest of them, though. Ayer's version of logical positivism is the one usually taught to philosophy students in English textbooks on the history of 20th century, but it isn't really representative of most or the best or the most influential works of logical positivism (from the likes of Carnap, Hempel, Neurath, or Waismann).
@wildmandrake@philosophy Also, there's a heavy focus there on British empiricism, i.e. the tradition of Locke, Hume, and Berkeley. Not that they're not all worth reading, but if you want a grasp of the great variety within historical western philosophy, you'd do well to exchange Locke and Berkeley for Leibniz and Spinoza.