Several Fanatical book bundles which may be of interest:
https://www.fanatical.com/en/bundle/...as-book-bundle 53 Baen and public domain collections. There's only 4 novels I'm interested in; most of the other novels I got off one or other Baen CD-ROM. Sadly, not a build your own bundle. Having said that, I wonder if any are updated editions.
https://www.fanatical.com/en/pick-an...-novels-bundle A build-your-own bundle. Unfortunately, only 2 books seem interesting, and the art isn't great IMO.
https://www.fanatical.com/en/bundle/...or-book-bundle A better collection, but we have most of the public domain books. The Hardinge and the di Filippo look interesting, as do two of the Kuttner collections and the Leiber collection. Most of the other authors featured I've never heard of, but I wouldn't necessarily as I don't really read horror.
https://www.fanatical.com/en/bundle/...ic-book-bundle 1 day left on this one
Also there's
https://www.fanatical.com/en/bundle/...lhu-rpg-bundle plus some Traveller bundles.