It always makes me smile that so many "new" courses appear online with the secrets to writing good copy.
99% of what they cover is the basics that have remained unchanged for years. Sure there are a few specific tricks and methods that can be employed online but the fundamentals are steadfast.
So while this copywriting book is an older publication that deals mainly with print, etc - you will still learn a lot from its pages.
Not long ago this book was being sold online for $47 but I am letting you have it at no charge.
Masters of Copywriting is a PDF download. Right click on the link below and choose "Save As..." to download it to your computer. masters-of-copywriting