What's the Horizon Sa Quick Return?

The book is free and on line, and it'll give you instructions about how to downlie the soft ware. The web siders o texts dot com slash f p three are a little publishing company i set up largely to publish this book. And because they're both on line and open access, they're easy for me to update. As soon as some one says there's a typo or there's a bug, i fix it within a day. Itoits really is having an impact, which is nice to see. I'm always happy to have feedback on both the book and the soft ware about things we can do better.