In 2014 there was no Kindle Unlimited service available and as  of June 2015, there were over one million titles available in Kindle Unlimited from publishers such as Houghton Mifflin Harcourt, based in Boston's Financial District.
In 2014 there was no Kindle Unlimited service available and as  of June 2015, there were over one million titles available in Kindle Unlimited from publishers such as Houghton Mifflin Harcourt, based in Boston's Financial District.