eReader1 US also works for any country that uses amazon.com for their kindle books. The only reason I specify US in the title is I can only see US pricing on .com so I don't know if the book is free everywhere.
General rule is that the books must be free or on sale when shared & have a minimum average review of 4+ stars. I don't share erotica.
We also share daily tips, give advice & help on your Kindle questions, do daily book chat and do monthly contests. Contests are usually a book giveaway but this month, eReader1 US is giving away a Kindle Fire! You can enter there or on this blog but entry requires being member of the eReader1 US facebook page.
Coming soon! I will soon be offering the chance for authors to sponsor giveaways on this blog and the facebook page. Prizes can be anything from a copy of your book to a Kindle. I'll share more in the coming weeks!