For those interested in e-books, there are thriving groups on Facebook where indy authors will post their book, or a link to said, for the purpose of garnering reviews
. Books can be had for free in practically any genre. Of course, mostly these are self published, which often means variable quality in terms of writing, editing, formatting, etc.
I run a small publishing house, and we too will provide freebies to people in expectation of a review down the line.
It is now a standard practice in the Indy/Small Publisher arena.
If anyone is interested, I have available (for free) a historical drama (about king Canute/Vikings), a steam punk alternate history
and an urban fantasy about witches and magic.
Just let me know if you want a link, and you can get the books for free. Note: These are professionally produced, not self-published...