Three tales here: once set in Classic Trek, the second on DS9 and the last within Peter David's New Frontier world (adjacent to Next Generation). I wouldn't say that they're of variable quality because none of them really leap of the page as Star Trek stories, whilst the artwork for the second, 'n-vector', by Toby Cypress, is downright ugly although the colouring captures the tonal palette of DS9 well. In the first story we're interested to a new pan-dimensional ultra powerful character called 'djinn' which dismisses it's origins as related to human descriptions of genies & djinn, although it immediately claims it has a deep & long hatred of humanity...another Q-continuity creature...? That question is left unanswered. Peter David's story, 'Double time', is probably the best written, but it's timey-wimey shenanigans ties it in knots and it almost has the feeling of being written, just for its final line.
Disappointing, overall.