various e-book readers. From right to left iPad (Apple、2010) kindle DX (Amazon、2009) kindle 2 (Amazon、2009) kindle 1 (Amazon、2007) PRS-505 (Sony、2007) PRS-500 (Sony、2006). (Photo credit: Wikipedia)
Below I suggest a number of websites where you can list your book when it is free.
I am not able to make my book free on Amazon for a selected period of time because I am not with the KDP Select programme. Many of the free book lists are for books going free on Amazon Kindle only. I now realise that there may have been an advantage in going with Amazon KDP select initially rather than going for non-exclusive promotion of my book on Amazon and Smashwords.com.
If you are not in Amazon KDP select then you can advertise your book as free in different formats at these websites:
http://freebooksy.com/editorial-submissions This website allows you to advertise books, which are free on Amazon, Nook, Kobo and Apple
http://blog.orangeberrypromo.com/sign-up-sponsorship-2/ Scroll right down to the bottom and you will see the orangeberry newbie promotion, which is the only free one. Your book has to have been published in the last 30 days and be free.
www.greatbooksgreatdeals.com You need to have 20 reviews with a 4+ rating or more to advertise on their free book list. However, you can advertise your book when it is free on Amazon and in the Barnes and Noble Nookstore.
http://ereadergirl.com/submit-your-ebook/ Your book has to be non-fiction, a children’s e-book or Christian fiction to advertise on this website. You can add your book to their list when it is free on Amazon, Barnes and Noble Nookstore and as a PDF on your own site.
http://authormarketingclub.com/members/submit-your-book/ You can use their free submission tool. It links to all the free listing websites easily.
http://blog.booksontheknob.org This site offers listings of free books in multiple formats-Nook, Sony, Kobo, Apple, Kindle.
Other websites where you can advertise your book when it is free on Amazon only are:
http://www.freebookdude.com/p/list-your-free-book.html You can post your book here when it is free on Amazon Kindle or any other Kindle website.
http://digitalbooktoday.com/12-top-100-submit-your-free-book-to-be-included-on-this-list/ You have to have 18 + reviews with 4+ rating to advertise your free book here. It also has to be a full-length book.
http://www.fkbooksandtips.com/for-authors/ You need to have reviews with a 4+ rating
So where can you advertise when your book is not free?
https://www.facebook.com/galleycat/app_362465080506455 You can put any new book up here.
http://addictedtoebooks.com/submission Your book has to be under $5.99 and have at least 5 reviews on the US Amazon website.