Chapter 5 - "The Dementor" - In which the students leave the Leaky Cauldron for Hogwarts, board the train, discuss Hogsmeade and a sleeping Professor Remus Lupin prevents a fight with Malfoy. The train is boarded by Dementors, Harry passes out, McGonagall wants a word with Harry and Hermione and Hagrid is the new Care of Magical Creatures teacher.
Glorious Days in Diagon Alley
[Harry] goes into [Flourish and Blotts] to buy his books, and discovers that the [manager] is frustrated over selling [The Monster Book of Monsters]. He also sees a large dog on the cover of a book about death omens, and recognizes it as the one he saw just before the [Knight Bus] nearly ran him over.
Time passes for [Harry] in [Diagon Alley], and he runs into some schoolmates but can't find [Ron] or [Hermione].
[Ron] and [Hermione] finally spot [Harry] and they meet up at [Florean Fortescue's]. He admits to blowing up [Aunt Marge], [Ron] shows off his new [wand], and Hermione decides to buy an [owl], so the group sets off for [Magical Menagerie].
In [Magical Menagerie], as [Hermione] looks at [owls], [Ron] buys some [rat tonic] for [Scabbers] and then gets attacked by a huge cat named [Crookshanks], causing Scabbers to bolt from the store and Ron and [Harry] to give chase.
[Hermione] emerges from the store having purchased [Crookshanks], and she, [Ron], and [Harry] set off for the [Leaky Cauldron], having finished their day of shopping.
An Evening with the Weasleys
Walking into the [Leaky Cauldron], [Harry], [Ron], and [Hermione] encounter the rest of the [Weasley] family, talking about [Sirius Black] and, of course, making fun of [Percy].
[Harry], [Hermione], and the [Weasleys] dine together at the [Leaky Cauldron], discussing the [Ministry cars] that will take them to [Kings Cross Station] in the morning.
As he wanders around looking for [Ron]'s [rat tonic], [Harry] overhears [Arthur] and [Molly Weasley] discussing [Sirius Black] - and learns that the reason [Black] escaped was to come after him.
[Harry] quickly passes [Fred and George], who are altering [Percy]'s [Head Boy] badge, delivers the [rat tonic] to [Ron], and thinks about how [Sirius Black] is after him, and what it will mean for his school year.