Nick Cave has delivered a scathing assessment of Russell Brand ’s latest book, How To Become a Christian in 7 Days . The 68-year-old Australian musician, who is well known for dealing with religious themes in his work, was asked about Brand’s book in the latest installment of his Red Hand Files email. He replied simply: “Good for atheism.” Brand has been widely ridiculed online in the past week after the former comedian spent over 90 seconds attempting and failing to find a Bible passage he read in court while promoting his book on Piers Morgan Uncensored. He will face trial later this year over allegations of rape and sexual assault made against him by six women. He denies all the charges , which date from 1999 to 2009.…