The issues featured in the image are: Top left: Issue #15, titled "Extremist Measures!" Top middle: Issue #16, titled "A Meeting of Minds!" Top right: Issue #17, titled "Despero!" Bottom left: Issue #18, titled "Wings of Fury!" Bottom middle: Issue #19, titled "Big Blowout!" Bottom right: Issue #20, which is a "The Millennium Giants!" tie-in issue. These issues are part of the acclaimed Peter David run, which merged the protoplasmic Matrix Supergirl with human Linda Danvers, exploring themes of identity and redemption. Issues #10-20 were collected in the Supergirl by Peter David Book Two graphic novel.