If you're hunting for a copy of the 'Iron King' audiobook edition, there are a bunch of legit places I'd check first. My go-to is Audible (Amazon) — they usually carry most mainstream audiobook editions, let you sample the narrator, and often have series bundled or available via credits. Apple Books and Google Play Books are solid alternatives if you prefer to own a file tied to your account without Audible’s credit system. I always listen to the free sample before buying so I know the narrator and pacing suit me.
If you like supporting indie bookstores, Libro.fm is a favorite; they sell the same audiobooks but route the purchase toward an independent shop. For borrowing rather than buying, Libby/OverDrive and Hoopla (through your public library) are lifesavers — you can often borrow the audiobook for a few weeks for free if your library has the license. Scribd and Audiobooks.com are subscription services worth scanning for the title as well.
Pro tip: check the publisher name, narrator, and ISBN if you want a specific edition (sometimes audiobooks get re-released with different readers or bonus material). For physical collectors, used CD copies pop up on eBay or Discogs. Also watch for seasonal sales (Chirp, Audible sales) — I've nabbed pricey series entries for cheap that way. Happy listening — I always get oddly comforted by a narrator who just clicks with a series, so I hope you find the perfect edition for your ears.