The bookcase has a few things on it, all apparently relating to period or to the SCA.
One entire shelf is dedicated to period dance, and includes a bound set of The Letter of Dance and a collection of music CDs labeled Mistress Ellisif's Dance Music.
The next shelf is apparently dedicated to the SCA itself. There is a small pamphlet, marked "Payment On Demand", with a picture of two white lab mice on the cover. There is an elegant, but incomplete, edition of the Historical Corpora and Bylaws of the SCA next to that, and a smaller pamphlet marked The Provost's Handbook.
Finally, there is a shelf of other period topics. There is a nice Bibliography of Medieval Drama sitting there now.