From site: Microsoft Reader is a free software application designed to deliver an on-screen reading experience that approaches the convenience and quality of paper. Microsoft Reader is the first product to include patented ClearType display technology, which improves resolution on LCD screens by up to 300 percent to deliver a print-like display. Microsoft Reader also pays strict attention to the traditions and benefits of good typography. It offers a clean, uncluttered layout; ample margins; proper spacing, leading, and kerning; plus powerful tools for marking, highlighting, and annotating your eBooks.
Learning Reviews note: Although the reader is free, most of the eBooks that use it must be purchased. Microsoft also has a collection of more than 1500 eBooks that can be downloaded for free from their Reader Catalog. Most of these free titles are compiled by the U. of Virginia Library and include classics from authors such as Mark Twain and H.G. Wells. Check out other Microsoft Reader options here.
