Opus Magnum thanks you for your input. Crowdsourced recommendations help us to determine material that is proven useful. It is our aim to only list a book if it has been personally verified to have had a meaningful impact on its reader. For this reason, we greatly appreciate your participation. Also, if you are interested in learning more about certain subjects, just ask. We can point you in the right direction… Thanks!


Enjoy Opus Magnum? All donations are greatly appreciated!


Your Cart