Sefton Central Labour MP Bill Esterson said it could be the final chapter for many of Sefton's libraries because Tory-Lib Dem Government cuts are crippling local councils.
Speaking in Parliament, Bill Esterson again called on the Government to provide ring-fenced funding to save libraries.
Questioning Secretary of State for Culture, Media and Sport Maria Miller, Bill said: "To discourage the closure of libraries like Aintree Library in my constituency, the government needs to make sure the money is there to keep them open. Will the secretary of state (Maria Miller), speak to her colleagues across government to make sure the funding is in place to safeguard library services like those in my constituency which are under threat from cuts to council funding."
In response, Ms Miller said: "It is up to councils to decide how to spend their money."
Bill slammed the Secretary of State's response.
He said: "Councils have had their money cut so far that the only services they can guarantee are collecting the rubbish and social care.
"The government's cuts in Sefton mean there is no money for other services like libraries and sport.
"It is the people of Aintree and Melling who will suffer as a result of this government's cuts.
"The Tories and Lib Dems know the damage they are doing to Sefton. They know the real-terms impact of cutting Sefton's budget by more than 40%.
"They know their cuts are going to devastate services in Sefton. Whereas North Dorset has had cuts of just £1.20 per person, the latest figures indicate that cuts in Sefton have totalled in excess of £350 per person.
"This is an attack on Sefton. It is an attack on its services. And it is an attack on its people.
"I will continue to do all I can to save our services and expose this Tory-Lib Dem Government's outrageous attack on our council."