The link to buy Cosmic Muse as an ebook is a little awkward -- it's available in so many formats, the publisher has supplied a "catch all" link which will send you to something called "Books 2 Read," and from there, you can bump on to your store of choice, with something like nine options ... though not without allowing Books 2 Read to set "preference" cookies (which, for myself, I prefer not to do. It's your call).
So I'll give you three links here: this first will take you to the aggregator, Smashwords, where books funnel through to ebook stores galore; the second is to the "Books 2 Read" page, where you can make your own decisions about whether you'll accept cookies; and the third link is to the paperback edition of this anthology, available from Amazon.