Single card gives access to more than one million books
The pilot gives card holders access to 120 libraries and 1.6 million books.
A pilot scheme for a single card for use in any library has been launched in the north east.
The project, which will give card holders access to more than 120 libraries and 1.6 million books, was launched at Aberdeen Central Library by culture secretary Fiona Hyslop.
It will test how well the card improves access to libraries across Aberdeen, Aberdeenshire, Angus, the Highlands and Perth and Kinross.
The Scottish Government public library improvement fund has supported the scheme with £15,000.
Ms Hyslop said: "We place great importance on public libraries and believe everyone should have access to library services.
"If successful, this pilot will pave the way for a national library card, which will make it easier for people to take advantage of library services wherever they are in Scotland.
"As well as traditional services like book lending, libraries are also places where people can access free WiFi, use a computer and socialise.
"Libraries can empower communities, helping tackle inequality, reduce isolation and boost the local economy."
The scheme will be rolled out to the whole of Scotland if successful.