Legislation to modernise the National Library of Scotland is expected to be agreed on Wednesday.
The Scottish Government wants to update the way the establishment is run and make the collections more accessible to the public.
The size of the board will be reduced and future appointments will need to be based on merit.
Free access is offered to a library collection of more than 14m items, including the last letter written by Mary Queen of Scots and the first printed book, the Gutenberg Bible of 1455.
Material is held in over 490 languages.
The general principles of the National Library of Scotland Bill have already been given the unanimous support of Holyrood's Education and Culture Committee.
Some concern was raised that the legislation is a step towards government centralisation.