Andrei Molotiu has compiled an incredible anthology of non-narrativity and abstraction in his Abstract Comics: The Anthology 1967-2009 (Seattle: Fantagraphics Books, 2009). The book is companion to his excellent blog Abstract Comics: The Blog. Covering 43 different artists, Abstract Comics opens with a exemplary discussion of abstraction in comics books and its overlap with contemporary art...
The book is an incredible resource of potentiality (and the blog only furthers the discussion); I can’t recommend it higher.
Derek Beaulieu on "Abstract Comics"
Poet and visual poet Derek Beaulieu has written a column on Abstract Comics: The Anthology, where he also focuses on anthology contributor and blog member Billy Mavreas.