The Trillia Group

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The Trillia Group was founded in 2001 with the goal of providing quality texts at the lowest cost to the widest audience. There are currently four math books featured on the site, and the site already has a partnership with Widernet. The books are mostly of a decent size and could be used for a course, if one was teaching a course on math analysis or theory.

Website Category Rating (1-5 Stars) Comments
Ease of Use Picture1 The site is easy to use, very minimalist. The products are on the left side listed, and easy to find since there are only 4.
Truly Free 5stars Each book has free PDF download links.  Books are available in letter or legal size, and in large or regular print.
Quality 5stars The book quality is good, each one is well made and has sufficient resources.
Offering 3stars The small offering of 4 books although they have been in operation for over 10 years is somewhat disheartening, along with the fact that math theory is not a topic for the average student.
Books Category Rating (1-5 Stars) Comments
Size Appropriate Picture1 The books are mostly size appropriate for math texts.
Proofreading 5stars Books are proofread and written by those knowledgeable in their fields.
Reviewed 5stars There are no places for review, but each book is given an ISBN and is published as if it is an actual book, so it would have had to be reviewed somehow.
Supplemental Material
(answers to problems, glossary, index)
5stars Books include indexes, problems, and solutions.

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