Genealogical.com is a bookstore for genealogy and family history books. They sell hardbound, paperback and online books and have a subscription plan which allows you unlimited access to all included titles and you can read the books on any phone, tablet, or computer.
Genealogical has subscription plans for:
Genealogy at a Glance, 34 books
Getting Started with Genealogy, 24 books
The Irish and America, 42 books
The Scots and America, 57 books