The Question and Answer section for Orlando is a great resource to ask questions, find answers, and discuss the novel.
The novel ends with Orlando's random meeting with Nick Greene and their subsequent lunch. Greene encourages Orlando to publish her book, and even says he will review it.
The central conflict in the story is internal..... and relates to confusion over sexual identiyy. Orlando changes from male to female over the course of the novel.
The climax occurs when Orlando finds herself in 1928 and becomes undeniably aware of her multiple personalities.