Classic copywriting manual going back into print...
 

Here's something interesting - I've seen paperbacks of this title
for sale for upwards of $500, but as low as about $50, but rarely.

I never pulled the trigger and bought a used copy, because I assume
the material is dated and somewhat redundant. Still, it's a highly-regarded
copywriting classic which will soon be available as a new edition
again.

It's "Making Ads Pay" by John Caples, and it is available for advance
ordering on Amazon and perhaps elsewhere:

Amazon.com: Making Ads Pay: Timeless Tips for...