Disclaimer: I do not own PJO or LDC
Note: Once you read this, you will stop reading Last Dragon Chronicles and Percy Jackson and the Olympians. These are crazy connections that I found and you will always remember this.
1. LDC- The colours, Purple and Green, are Pennykettle colours.
1. PJO- The hearth fire turned green then violet during a campfire sing- a-long.
2. LDC- Lucy started out as 7 yrs. Old, but now she is 16.
2. PJO- Annabeth ran away from home when she was 7 yrs. Old, but now she is the same age as Lucy.
3. LDC- In The Fire Eternal, David goes missing then returns.
3. PJO- In The Battle of the Labyrinth, Percy goes missing, then returns.
4. LDC- In Dark Fire, Grockle and Lucy dig up for Tam Farrell.
4. PJO- In The Last Olympian, Mrs. O'Leary, a hellhound, digs up for Chiron the centaur.
5. LDC- Aunty Gwyneth: "So beautiful, like Guinevere herself."
5. PJO- Aunty Em (Medusa): "So beautiful, like Athena herself."
6. LDC- In The Fire Eternal, Tam Farrell confesses Dionysus as a 'she'.
6. PJO- Actually Dionysus (Mr. D) is a 'he'.
7. LDC- In Fire World, the librarium of Co:pern:ica has 600 floors.
7. PJO- The Empire State Building has 600 floors.
8. LDC- In Dark Fire, David sees a lion and a zebra in Africa.
8. PJO- In The Lightning Thief, Percy, Grover, and Annabeth free a zebra and lion in Vegas.
9. LDC- In Fire Star, David takes a field trip to the arctic.
9. PJO- Percy takes a field trip to the museum.
10. LDC- 12 legendary dragons.
10. PJO- 12 Olympian gods and goddesses.
11. LDC- In Dark Fire, Melanie and Rachel gets attacked by birds on the road.
11. PJO- In The Lightning Thief, Percy, Grover, and Sally get attacked by a Minotaur on the road.
12. LDC- In Fire star, David goes to Farlowe Island for Arthur.
12. PJO- In The Sea of Monsters, Percy, Tyson, and Annabeth go to an island, very similar to Farlowe, for Grover.
13. LDC- Gretel uses Nectar to heal Liz.
13. PJO- Nectar is a sweet potion for demigods.
14. LDC- In Icefire, Henry invites David to his study room.
14. PJO- In The Titan's Curse, Dr. Chase, Annabeth's father, invites Percy to his study room.
15. LDC- In Fire World, David starts out 12 yrs. Old.
15. PJO- In The Lightning Thief, Percy starts out 12 yrs. Old.
16. LDC- In Dark Fire, David knocks on Lucy's door 2 times, saying, "Hi, knock, knock, can I come in?"
16. PJO- In The Battle of the Labyrinth, Percy goes into the Athena cabin, surprising Annabeth with the same quote.
17. LDC- In Dark Fire, David shows Zanna the finger gun.
17. PJO- In The Battle of the Labyrinth, in a game of rock, papers, and scissors, Percy shows the finger gun to Brias.
18. LDC- In Icefire, Zanna tells David a diversion.
18. PJO- In The Battle of the Labyrinth, Annabeth tells Percy the same thing.
19. LDC- In Fire star, Gwillanna, in raven form, flies across the arctic.
19. PJO- In page 63 of The Titan's Curse, Thalia has that same expression.
20. LDC- In The Fire Eternal, Leroy removes Lucy out of the National Endeavor building.
20. PJO- In The Titan's Curse, a demigod named Leroy gets killed in 1999.
21. LDC- In Fire star, David heads north to find Gawain.
21. PJO- In The Son of Neptune, Percy heads north to find Gaia.
22. LDC- David has the mark of Oomaraa.
22. PJO- Percy has the mark of Achilles.
23. LDC- David can cause timequakes.
23. PJO- Percy can cause earthquakes.
24. LDC- In The Fire Eternal, Liz talks about the old string theory.
24. PJO- In The Battle of the Labyrinth, Annabeth talks about the same string theory.
25. LDC- In Dark Fire, semi darklings are mutant ravens.
25. PJO- In The Demigod Files, Clarisse fights the blackbirds which are semi darklings.
26. LDC- In Dark Fire, the rising sun shines through the horse on Scuffenbury Hill.
26. PJO- In The Demigod Files, Annabeth says the temple she's building in the future, includes the rising sun shining through the window.
27. LDC- In The Fire Within, David confessed he'll never meet Gawain down a long dark alley.
27. PJO- In The Demigod Files, Grover confesses he'll never meet Mr D (Dionysus) down a long dark alley.
28. LDC- In Icefire, Zanna says something about "fashion statement."
28. PJO- In The Demigod Files, Percy says the same thing about "fashion statement."
29. LDC- In Icefire, David receives a rose form Gretel.
29. PJO- In The Demigod Files, Percy and Thalia both squish the same rose with their hands.
30. LDC- Zanna has the 3 pronged symbol called the Mark of Oomarra.
30. PJO- Percy has the same symbol. (Trident)
31. LDC- In The Fire Eternal, Lucy makes a 3 fingered claw over her heart. (Mark of Oomarra.)
31. PJO- In The Sea of Monsters, Grover taught Percy the Mark of Oomarra.
32. LDC- In The Fire Eternal, Lucy goes through a timerift in Blackburn to Farlowe Island.
32. PJO- In The Sea of Monsters, Grover goes through the SAME timrift in Florida to Farlowe.
33. LDC- In Dark Fire, Lucy finds the colors, red, blue, green, and gold at the Old Gray Dragon hotel.
33. PJO- In The Battle of the Labyrinth, Percy, Grover, Annabeth, and Tyson find the same colors in the Labyrinth.
34. LDC- In Dark Fire, the Glissington Tor tunnel includes a wine cellar.
34. PJO- In The Battle of the Labyrinth, the Labyrinth has a wine cellar.
35. LDC- In The Dragons of Wayward Crescent: Glade, Lucy is horrible at spelling.
35. PJO- In The Ultimate Guide, Percy is horrible at spelling.
36. LDC- In Dark Fire, the Scuffenbury tunnel's floors changes in size, color, and texture.
36. PJO- In The Battle of the Labyrinth, it has the same features.
37. LDC- In Rain and Fire, it shows of David's report card.
37. PJO- In The Ultimate Guide, it shows of Percy's report card.
38. LDC- In Rain and Fire, David blows up the chemistry lab.
38. PJO- In The Sea of Monsters, Percy blows up an experiment in his lab.
39. LDC- In Fire star, it introduces of Arthur Merriman.
39. PJO- In The Titan's Curse, it introduces of Paul Blofis.
40. LDC- In The Fire Within, David owns a teddy bear named Winston.
40. PJO- In The Demigod Files, the same teddy bear could be found in Annabeth's camp trunk.