This artikulo was inspired sa pamamagitan ng comments sa pamamagitan ng Pensieve_Seeker. It lists 40 examples of ring composition within the series.

1. Voldemort's first defeat is discussed in the first chapter of Philosopher's Stone. He returns in Goblet of apoy and is defeated for the final time at the end of Deathly Hallows.

2. Harry sees his late parents in the Mirror of Erised in Philosopher's Stone. He sees them again via Priori Incantem in Goblet of Fire, and again through use of the Resurrection Stone in Deathly Hallows.

3. Harry becomes an orphan at the start of the series, and in Deathly Hallows his godson, Teddy Lupin, is also orphaned. Both boys are raised sa pamamagitan ng maternal relatives rather than their godfathers.

4. Harry travels to Hogwarts on the Hogwarts Express for the first time in Philosopher's Stone. One of his sons does the same in the epilogue of Deathly Hallows.

5. Ginny is shown to be impatient to go to Hogwarts in Philosopher's Stone, and her daughter is pagganap similarly in the epilogue.

6. Harry is left at privet Drive in Philosopher's Stone and is brought there sa pamamagitan ng flying motorbike. He leaves the Durleys' tahanan for the last time in Deathly Hallows using the very same motorbike.

7. When Dumbledore first appears in Philosopher's Stone, his nose is described as looking as if it's been broken. In Deathly Hallows we learn the circumstances in which this happened.

8. Dumbledore is seen using the Deluminator during the first chapter of Philosopher's Stone. In Deathly Hallows this is inherited sa pamamagitan ng Ron, and he uses it to return to Harry and Hermione.

9. In Philosopher's Stone, Harry nearly chokes on the Snitch at the end of his first Quidditch match. This same Snitch is significant in Deathly Hallows as it houses the Resurrection Stone.

10. In Philosopher's Stone, Quirrell attempts to steal the Stone from a Gringotts hanay ng mga arko for Voldemort, and fails only because it had been previously removed. In Deathly Hallows, Harry, Ron and Hermione succeed in stealing one of Voldemort's Horcruxes from the Lestrange family's Gringotts vault.

11. In Philosopher's Stone, Hagrid mentions rumours that some of the highest security Gringotts vaults are guarded sa pamamagitan ng dragons. In Deathly Hallows this is confirmed when Harry, Ron and Hermione flee the bank on the back of a dragon.

12. Harry buys his owl Hedwig in Philosopher's Stone. She dies in Deathly Hallows.

13. In Philosopher's Stone, Harry suspects that Snape is working for Voldemort but is proven wrong at the end of the book. In Deathly Hallows, Harry again learns that he is mistaken about Snape's allegiances.

14. In Philosopher's Stone, Neville stands up to Harry, Ron and Hermione, and as a result earns the House points which help Gryffindor win the House Cup. In Deathly Hallows, Neville stands up to Voldemort which leads to him destroying the last Horcrux, Nagini.

15. An enchanted mirror, the Mirror of Erised, plays an important role in Philosopher's Stone as the means to access the Stone. A different enchanted mirror is important in Deathly Hallows since it helps the group to escape from Malfoy Manor.

16. Philosopher's Stone contains a chapter titled The Forest, while Deathly Hallows includes a chapter tiled The Forest Again. Both chapters involve Harry encountering Voldemort in the Forbidden Forest.

17. In Chamber of Secrets, the Dursley tahanan is visited sa pamamagitan ng the house elf Dobby. The house is visited sa pamamagitan ng another house elf, Kreacher, during Half-blood Prince.

18. In Chamber of Secrets, Harry visits Knockturn Alley sa pamamagitan ng accident, and spies on Draco and Lucius Malfoy while hidden in the vanishing cabinet in Borgin & Burkes. In Half-blood Prince, Harry visits Knockturn Alley again and spies on Malfoy while he enquires about the same cabinet.

19. In Chamber of Secrets, Harry wrongly suspects Malfoy of being the Heir of Slytherin and attacking Muggleborn students. In Half-blood Prince, Harry correctly suspects Malfoy of being a Death Eater and harming students.

20. The first Horcrux appears in Chamber of Secrets, though the diary is not yet identified as such. The existence of Voldemort's Horcruxes is revealed in Half-blood Prince.

21. The first Horcrux is also destroyed in Chamber of Secrets. The destruction of the segundo is revealed in Half-blood Prince, and Harry and Dumbledore attempt to find and destroy the third.

22. Harry comes into possession of an old, dangerous book which belonged to Voldemort in Chamber of Secrets, and he comes into possession of a different book in Half-blood Prince which belonged to Snape.

23. In Chamber of Secrets, Harry learns something of Voldemort's past through the memory shown to him sa pamamagitan ng the diary. In Half-blood Prince he learns madami of Voldemort's past and origins through various memories collected sa pamamagitan ng Dumbledore.

24. Harry learns Voldemort's birth name, Tom Riddle, in Chamber of Secrets. He learns Snape's alias in Half-blood Prince.

25. In Chamber of Secrets, Harry shows loyalty to Dumbledore which caused Fawkes to come to his aid. In Half-blood Prince, Harry again shows loyalty to Dumbledore sa pamamagitan ng identifying himself as "Dumbledore's man through and through".

26. In Chamber of Secrets, Ginny has a crush on Harry but Harry is not romantically interested in her. In Half-blood Prince, Harry develops feelings for Ginny but for the majority of the book she appears to have moved on.

27. Malfoy mockingly refers to Ginny as Harry's girlfriend in Chamber of Secrets. At certain points in Half-blood Prince she truly is Harry's girlfriend.

28. Hermione is in the hospital wing during Chamber of Secrets after being Petrified. Ron is in the hospital wing during Half-blood Prince after being poisoned.

29. The giant gagamba Aragog is introduced in Chamber of Secrets. He dies in Half-blood Prince.

30. The Dementors are introduced in Prisoner of Azkaban, and some are sent to attack Harry in Order of the Phoenix.

31. Harry accidentally uses magic on Aunt Marge in Prisoner of Azkaban, but is pardoned. When he uses magic to protect himself and Dudley from a Dementor attack in Order of the Phoenix, Harry is initially expelled for using magic underage and in front of a Muggle but later cleared.

32. Harry travels on the Knight Bus for the first time in Prisoner of Azkaban, when he flees his aunt and uncle's home. He travels on it for the segundo time in Order of the Phoenix when he goes to visit Arthur Weasley in St. Mungos.

33. Sirius Black is introduced in Prisoner of Azkaban and dies in Order of the Phoenix.

34.    Sirius escapes from Azkaban in Prisoner of Azkaban. His cousin, Bellatrix Lestrange, escaped in Order of the Phoenix along with her husband and brother in law. These were the first and segundo known escapes from the prison.

35. Harry successfully saves Sirius in Prisoner of Azkaban sa pamamagitan ng giving him Buckbeak as a means of escape. He attempts to save Sirius in Order of the Phoenix, but falls into a trap which leads to Sirius' death.

36. Harry learns about his father's mga kaibigan and being an illegal Animagus in Prisoner of Azkaban. He learns madami about his parents' years in Hogwarts in Order of the Phoenix when he sees Snape's memory.

37. Harry first develops a crush on Cho Chang in Prisoner of Azkaban. He kisses her and goes on a petsa with her in Order of the Phoenix.

38. A Time-Turner first appears in Prisoner of Azkaban and plays a vital role within the book. The Ministry's supply of Time-Turners are all destroyed in Order of the Phoenix.

39. In Prisoner of Azkaban, Harry learns that his parents died as a result of being betrayed sa pamamagitan ng one of their friends. In Order of the Phoenix, he learns that the prophecy was another factor.

40. Professor Trelawney predicts Voldemort's return in Prisoner of Azkaban, her segundo prophecy. In Order of the Phoenix we learn of her first prophecy, which predicts Harry's role in Voldemort's downfall.