Tor.com are giving away the first 4 books of the Murderbot sci-fi series, one each day. I assume the dates are UK times, since the first book is still available.
Each ebook is available for free for 24 hours beginning from 6 AM ET (8 PM AEST), 19 April 2020.
Available to download in epub and mobi format.
Sign-up to their newsletter is required, but they don't seem to send out too much. Plus, you get notified when they have their monthly free book.
I enjoyed the first book. They're not particularly long, so maybe they're considered novellas? No idea really. But hey, free!
Great quirky scifi series. I've only read the first two, but have really enjoyed them a lot. Spam level on the newsletter is low too.