Kindle. With thin Brunner there's always the risk that the conceit or the drugs will wear out before he's made bank on the word count. This one is a discursive and partially successful take on the multiverse, larded with some crass social commentary. The spirit is Arthur C. Clarke's Childhood's End despoiled by 1970s disillusionment. It's a bit disjointed, with too many words spilt on more-or-less the same things.