The content here seems fairly good, but from opening a random sample of textbooks, I notice pretty consistently poor presentation and formatting. Almost everything is presented in a wall of single column text with long paragraphs, a small font, and limited in-set visualization. This was especially bad in Intro Sociology and Intro to U.S. Government from what I checked.<p>I found some pagination / page break issues (e.g. page 379 in Intro Statistics is empty and the transition from 381 to 382 also has a weird orphan problem). The same section also has section numbering problems. Edit: Reading more, I see a ton of equations that aren't rendered very well (page 405 in intro stats, look at all of the \bar{x} in the first half -- is this even using LaTeX to render or is this like a bad Microsoft Word equation editor thing?)<p>In the statistics world, OpenIntro Statistics -- <a href="https://www.openintro.org/stat/" rel="nofollow">https://www.openintro.org/stat/</a> -- seems quite a lot better as a textbook