Kate McCann, the mother of missing British girl Madeleine McCann, speaks during a news conference Wednesday, Sept. 23 2009, at a hotel in Lisbon.

Kate and her husband Gerry McCann returned to Portugal to hold talks with their lawyers. Madeleine was three years old when she disappeared from her holiday apartment in Praia da Luz, southern Portugal, while her parents were having dinner nearby on May 3 2007. (AP) 

Last week it was revealed that Goncalo Amaral, an investigator who initially helped investigate Madeleine McCann’s disappearance in Portugal, has written a second book about the case called ‘The English Gag.’

The parents of the missing girl, Gerry and Kate McCann, are considering a defamation lawsuit against Goncalo Amaral for his first book ‘The Truth of the Lie,’ according to Sky News. The Mirror reports that the couple is furious about the thought of a second book.

Amaral was removed from Madeleine’s case when he criticized British authorities and subsequently wrote the initial book about his beliefs surrounding the case. The McCanns have already been successful in banning further publication and sale of 'The Truth of the Lie' in Portugal. In that book, Amaral writes that Madeleine is dead and questions her parents’ account of the night she went missing.

In his new book, he asserts that there is something important about a pink blanket that he claims disappeared the night the 3-year-old went missing, according to the Mirror.

A source close to the McCanns told the Mirror, “They just despair. This is the level of distortion and lies they’ve been up against.” The source went on to state that no blanket disappeared as “You can see it on the bed in the first photographs taken of the room. Amaral wasn’t even there.”

Also last week, the McCanns traveled back to Portugal where their daughter disappeared in 2007. Nevertheless, they did not go to Praia da Luz, the location of the vacation apartment from which authorities believe Madeleine was taken from while her parents dined nearby.