A gang of crooks staged a break-in at Newton-le-Willows library.
Librarians turned up for work after the May bank holiday weekend to find thieves had forced their way into the Crow Lane East building and had stolen a number of computers.
Police say the burglary happened between 1pm on Thursday, May 23 and 7am on Tuesday, May 26.
PC Michelle Walsh said: “To burgle anyone is despicable but to steal from a community resource such as a library is even more so as they are there to help people.
“The last thing they need is to have to pay to repair damage to their building and replace expensive equipment due to the actions of a criminal.
“My officers are doing all they can for the library and have carried out extensive checks in the area to see if anyone was seen acting suspiciously. Every that can be done is being done but I would also call on the community to help us here.
“If anyone knows who may be responsible for this burglary, please come forward and tell us who it was and we will take action.”
Anyone with information is asked to contact Merseyside Police on 0151 777 6806 or Crimestoppers on 0800 555 111.