I used Beta-Reader for Life in Harmony before the book went into publication. The Beta-Readers received a print copy of book to be marked up and returned. They also completed a survey in exchange for a notation in the the book (see the Acknowledgement page at the end of the book).
For those interested in Beta-Reading, I hope you can understand we look to meet specific criterion for those we select for this task. We wanted to ensure we hit our target audience for the book and only included a couple of test demographic members. In all, we selected just a handful of Beta-Readers who were directly removed from knowing me (no family or friends). If you are interested in being a Beta-Reader in the future, please contact me through my contact page on this site. As future books are readied for publication, we will select people accordingly based on the audience for that book.