Dates
- Cover date
- December 2010
- On sale
- 2010
- Pages
- 36
Editions and covers (2)
Copies of #21 are not all the same book. Here is how to tell each one apart.
- Direct edition
Direct Edition
No UPC barcode in the corner box: direct editions show artwork, a logo or a blank box there.
Barcode 76281620000402111
This edition’s page - Newsstand edition
Newsstand
A UPC barcode in the cover's corner box.
Barcode 00912846971321
Source ↗
Reprinted in
Sonic Universe (2011), The Collector: Sonic Super Special Magazine (2011), Sonic Super Digest (2012), Sonic Comics Spectacular: Speed of Sound (2016)