Nigeria, Dec. 20 -- A biography has detailed how close associates of former President Muhammadu Buhari manipulated governance processes by issuing instructions to government officials, including security chiefs and the Central Bank of Nigeria (CBN), without his approval.

The book, "From Soldier to Statesman: The Legacy of Muhammadu Buhari," was authored by Charles Omole and launched in Abuja on Monday.

Written at the prompting of Mr Buhari's wife, Aisha Buhari, it featured contributions and interviews from Mr Buhari's family, -Mrs Buhari and his children, Hadiza, Safina, Zahra, Halima, Hanan, and Amina- and some senior officials in his administration.

Their testimonies lent credence to the long-held notion that certain individuals cont...