Malaysia - The Malay-language book titled "Islamic Sex" is not available in shops but is believed to have been read by hundreds of members of the club formed this year by a small Malaysian Islamic sect that practices polygamy.
The book contains no explicit photographs but was written by the club's 56-year-old founder to describe her experiences and opinions on marriage. It has passages on how couples should physically and spiritually approach sex, claiming that most women only satisfy ten percent of their husbands' sexual needs.
The government's Islamic affairs department studied the 115-page book and recommended banning it because it could cause confusion among Malaysia's Muslim majority about acceptable religious teachings, a Home Ministry official said on condition of anonymity.
Authorities have not decided when to formally ban the book, but people caught in possession of it could be fined up to 5,000 ringgit (£1,600), the official said. Anyone who makes copies of it for sale can be imprisoned for three years and fined 20,000 ringgit (£4,200).
Representatives of the Obedient Wives Club did not immediately answer calls to them.
Club leaders showed the book to journalists last month in an attempt to dispel what they called misconceptions that it was obscene and demeaning for women. They said the book was intended to be a spiritual guide read exclusively by club members to help them comprehend sex better.
Many Malaysians have denounced the club, saying it makes a mockery of modern gender roles in a country where women hold prominent posts in the government and private sector.
Club leaders have said a wife should serve as a "good sex worker" and a "whore" to her husband.
The Obedient Wives Club is believed to have at least 800 members in Malaysia and has established branches abroad in Indonesia, Singapore, Jordan and Britain. Many members are in polygamous marriages, insisting the practice helps husbands to avoid committing adultery. Islam allows men to take up to four wives.