The pattern based on two celestial granny squares joined on the go, and it includes:

• round-by-round written instructions accompanied by pictures,
• clear colorful charts,
• video links.

Pattern in American English terms.
• intermediate skill level written pattern;
• 5.5in/14cm x 7.5in/19cm;
• uses ch, sl st, sc, hdc, dc, edc (extended dc)
• explained and/or shown on video: popcorn, beginning popcorn, extended dc, how to join granny squares;
• sixteen pages total.