![The Canonical Stack [The Canonical
Stack]](https://web.archive.org/web/20150905112337im_/http://haddon.archanth.cam.ac.uk/wp-content/themes/cam/images/readercover.jpg)
The Canonical Stack—book sculpture by Christopher Evans and Issam Kourbaj (photograph, David Webb). The sculpture was an arrangement of books, mainly from the Haddon Library, and was photographed in situ there on 8 March 2008. All the books are now back in their normal use.
The Haddon Library serves the staff, research students and undergraduates of the University, together with members of the Cambridge Antiquarian Society. Staff and students of other Universities are welcome to read here, on production of evidence of academic bona fides. Other visitors should enquire in advance.

You can donate to the Haddon Library online. Or, if you prefer, read the library's appeal and then donate online. Start by clicking the 'Give Online' button above. Thanks!
- News and Events
Vacation opening hours
Monday – Friday 09:00-17:00
Saturday closed
Sunday closed
The Haddon will, additionally, need to close for lunch (13:00-14:00) during the following patches of vacation:
15-19 June
2-10 July
16 July
27-31 July
10-14 August
24-28 August
31 August – 4 September
21-25 September
There may have to be other lunch closures as well. Watch this space.
We have new power points on desks in the main reading room!
Thanks to Ally from Eyre Electrical and Tim from Jackson Environmental, who did the work, and Simon who came in early for them. Thanks to the UL, Estate Management and the Arch and Anth Department and its Divisions for funding.
Anybody got any pictures of these new power points in operation yet?