ALL 21 libraries in Calderdale could be affected by the council's spending cuts.
A review of where they are, what they do and how they might work better could save 150,000 a year.
"There is emerging evidence of alternative methods for delivering library services with central hubs and alternative models of provision," according to the budget proposals.
That could involve sharing services and accommodation, and even using volunteers.
The proposed review will also look at opening hours to see if they can be altered to better meet demand.
Background reports to council leaders suggest 12 jobs in the library service could go over the next two years.
Up to 200,000 a year could also be saved by reducing the fund for buying new books, CDs, DVDs and other library stock, demand for which is falling.
Charging people more to use the new swimming pools in Brighouse and Sowerby Bridge, along with other leisure centres and sports pitches, could save the council 600,000 a year.
"Feedback suggests that customers are prepared to pay more to use good facilities."
Encouraging local groups or organisations to take over some of the council's public halls could save 40,000 a year and the council plans to start charging for street trading licences.
*How will the cuts affect you and your family? Are you concerned about the proposals? Email your letters to: Yoursay@halifax
courier.co.uk or write to Yoursay, Evening Courier, PO Box 19, King Cross Street, Halifax, HX1 2SF.