Books – in colorful grids on the floor, piled on a remainders table, preciously designed and placed far out of reach on high shelves and in many more guises – fill Friedrich Petzel Gallery’s biblio-centric group show, ‘The Feverish Library’ (organized in cooperation with Matthew Higgs). Rachel Whiteread’s plaster, polystyrene and steel ‘Untitled (Sequel III)’ from 2002 lends a note of gravitas and mystery to the show by recording only the cast space around a bookshelf. (In Chelsea’s Friedrich Petzel Gallery through Oct 20th).