A thief has stolen a charity collection box from Burnham Library.
Wearing a dark hooded top, the robber broke in between 10.20pm and 10.30pm on Sunday (November 20) by smashing a glass door.
The pot, containing cash, was labelled 'Friends of Burnham Library' and was robbed from under the front desk in the main section of the library on Windsor Lane.
Police are appealing for any information.
Investigating Officer PC Emma Calow of Amersham Police Station said: “This is the second burglary at Burnham Library in the last month.
"Charity collection pots containing cash were also stolen on 27 October at around 12.10am.
"On that occasion entry was gained through a different door but also by breaking glass in the bottom panel.
“If you have any information on either incident please contact me via the Thames Valley Police enquiry centre on 101.
“If you don’t want to speak to police you can contact the independent charity Crimestoppers anonymously on 0800 555 111.
"No personal details are taken, information is not traced or recorded and you will not go to court.”