Jamie moves from the desk to the shelves - and as the door continues to crack further, the Scot starts pulling out any book he can find and tossing it away as soon as it's evident it's not the right one.

He looks over to check to see how close the monkey is to breaking through, his hand removing yet another volume from the shelf automatically. Judging from the splintering, the door has just about had it. He goes to toss the last book he's grabbed, but as he's about at to throw it, he actually remembers to glance at the call number on the spine - the one that reads 'QC75 .K18 2008'.

Hurrying over to the Doctor, he brandishes it so she can see. "Doctor! I found it!"