Book three is perhaps a little less obscure than the first two; it's "Swallowdale", the second volume of Arthur Ransome's "Swallows and Amazons" series.
Here's the blurb from inside the front cover
John, Susan, Titty and Roger, the crew of the Swallow, were beating south across the open lake. Sleeping in beds at home had already come to an end, and the plans they had been making for nearly a year were at last beginning.
Probably those Amazons Nancy and Peggy were already on Wild Cat Island plotting a welcome or an ambush, and they would begin camping, fishing, swimming and exploring again. Titty felt that it was still last year and that they had never left the lake and gone away.
And then shipwreck and native trouble (the Amazons' great-aunt) jeopardise the whole expedition.
And here's an extract from the start of Chapter Eighteen
It was not that Able-seaman Titty knew very much of the mother of the Amazons. She had seen her only twice, once last year after the great storm on Wild Cat Island, when she had been full of chatter and jollity, and once this year sitting sadly in the carriage side by side with the great-aunt, while Nancy and Peggy sat on the other seat facing them, and looking not at all like pirates. It was not really of Mrs Blackett she was thinking. She was thinking of her own mother. When Nancy told of how the great-aunt had made Mrs Blackett cry, Titty thought of what she would feel if someone were to do that to mother, and in a moment she was feeling as if the great-aunt had made mother cry, so that there was nothing Titty would not have been ready to do to the great-aunt if only it would stop her. She did not know if the wax image would work, but it was worth trying, even with candle-grease, because there was nothing else that she could do.
Poll Deadline is 20:00 GMT on Thursday, January 28th, 2010.