There is a
Steampunk Bundle at the Groupees site, minimum purchase is $2, with the option to donate some of the payment to charity. It is available for just 1 day and 16 hours more.
I pondered whether this was a legit deal to share here, since the books in the bundle are self-published, but I don't think that prohibition applies to this thread, and I also don't have any connection to the writers/artists or bundle site, so my post is not self-promotion. This bundle is a combination of games, music, ebooks and comics. The files are DRM free and the books are available as mobi, epub and pdf files. The comics are PDF files.