**AS SEEN ON BBC2''s BETWEEN THE COVERS**A Guardian Book of the YearMaggie Nelson is one of the most electrifying writers at work in America today, among the sharpest and most supple thinkers of her generation - Olivia LaingBluets winds its way through depression, divinity, alcohol, and desire, visiting along the way with famous blue figures, including Joni Mitchell, Billie Holiday, Yves Klein, Leonard Cohen and Andy Warhol. While its narrator sets out to construct a sort of ''pillow book'' about her lifelong obsession with the colour blue, she ends up facing down both the painful end of an affair and the grievous injury of a dear friend. The combination produces a raw, cerebral work devoted to the inextricability of pleasure and pain, and to the question of what role, if any, aesthetic beauty can play in times of great heartache or grief.Much like Roland Barthes''s A Lover''s Discourse, Bluets h