Gilchrist on Blake, a new edition of the 1863 Life of William Blake by Alexander Gilchrist, will be published by Harper Collins in August, edited by biographer Richard Holmes.
This is from the description on the Harper Collins Website:
. . . the first biography of William Blake ever written, at a time when the great visionary poet and painter was generally forgotten, ridiculed or dismissed as insane. Wonderfully vivid and outspoken (one chapter is entitled ‘Mad or Not Mad’), it was based on revealing interviews with many of Blake’s surviving friends. . . . Gilchrist adds detailed descriptions of Blake’s beliefs and working methods, an account of his trial for high treason and fascinating evocations of the places in London, Kent and Sussex where he lived. The book transformed Blake’s reputation.
Last spring the Guardian printed an excerpt from Holmes' introduction, which is available here.