Amazon says blocking of Keffler’s book about the excesses of contemporary transgender ideology was done in 'error': Sales of Maria Keffler’s book, “Desist, Detrans, & Detox: Getting Your Child Out of the Gender Cult” were blocked from Amazon's massive marketplace only six days after it was published on April 7. The following day Keffler told the Christian Post that Amazon sent her an email indicating sales of her book had been blocked in "error." Subsequently, the Kindle version went live again and the paperback is expected to return as well, according to the Christian Post.