Kim Guzman, the original creator of this pattern, also started a CAL (crochet along) blog that answers almost any question that you could have regarding this pattern - from how to execute and place the modified stitch to how to increase and decrease the size of your afghan. This is the link if you feel that would be useful for you:

http://www.crochetville.com/community/topic/93270-sweethe...

This pattern is not available for free, so here is a link to the site where you can buy an electronic version of it. It comes with four other reversible afghans as well for $8.95 (US).

https://www.anniescatalog.com/detail.html?prod_id=82779&a...

I believe those are all of the resources I used for this particular blanket. I am, however, working on a variiation of this pattern that I happened across about halfway through this project on blogspot by a user named Debbi-a1. If you are interested, the link to the first of her three posts regarding this variation follows.

http://debbia1.blogspot.com/2009/01/sweetheart-ripple-afg...
Now, I have not reached the changed part of the patten yet on my new project, however, I do want to state that while reading it over, when Debbi says, “fptc-sc (rep twice),” I do not believe that she actually intended for the stitch to be repeated twice. I believe the intent was to be repeated once, creating two of the same stitch. I may be wrong, but I will update this once I come to this part of the pattern.

I hope you all enjoy making this blanket as much as I did!!