What are the important pages of George Orwell's book, 1984? With important, I mean the main events in the book, for example, when Julia has sex...

The novel, 1984, is split into three parts and each of these parts contains important events. 

In the first part, for example, Winston's internal fear of the party begins to dissipate and he experiments with the idea of rebellion. We see this in his purchase of the diary, on pages 8-9, and his jaded view of rewriting history at the Ministry of Truth, on pages 40-43.

In Part Two of 1984, Winston's rebellious...

The novel, 1984, is split into three parts and each of these parts contains important events. 

In the first part, for example, Winston's internal fear of the party begins to dissipate and he experiments with the idea of rebellion. We see this in his purchase of the diary, on pages 8-9, and his jaded view of rewriting history at the Ministry of Truth, on pages 40-43.

In Part Two of 1984, Winston's rebellious feelings intensify and this has a profound affect on his outward sense of conformity. This is best illustrated on pages 123-133, in which Winston meets with Julia, his girlfriend, and the pair have sex in the woods, far away from the constant surveillance of the telescreens. Feeling the need for security, Winston rents the room above Mr Charrington's shop, on page 143, and this becomes his and Julia's hideaway.

Later in Part Two, Winston and Julia take their rebellion to the next level. They go to O'Brien's apartment, on page 174, and reveal themselves as party rebels. O'Brien arranges for Winston to receive a copy of Goldstein's book, which he reads aloud to Julia on page 192. But, on page 230, Winston and Julia are arrested by the Thought Police and taken to the Ministry of Love. 

Finally, in Part Three of 1984, Winston is tortured by O'Brien and his reintegration into society begins (page 273). Despite the beatings, Winston remains faithful to Julia, prompting O'Brien to send him to Room 101 where he is confronted by rats, his biggest fear (pages 298-300). Winston does, in fact, betray Julia and is released shortly after, as he is no longer a threat to the party. When he meets Julia again, on page 305, he learns that Julia also betrayed him and the love they once shared is over. All that is left for Winston is to accept that he loves Big Brother and he acknowledges this on the final page of the book, page 311. 

Please note that my copy of 1984 is the Penguin Classics Edition, published in London in 1990, and the page numbers in your copy may differ slightly.