– In the beginning of the series, Grover is 28 years old (making him about 33 by the Blood of Olympus)
– Someone in New York City has a statue of Smelly Gabe on their property
– Annabeth is really good at playing Hacky Sack
– Grover’s Uncle Ferdinand is still a statue at Aunty Em’s Garden Emporium (and is missing an arm).
– Annabeth’s father is a Harvard graduate.
– If Percy had aged with the books release dates, he would have been 21 in The Blood of Olympus.
– Travis and Connor Stoll aren’t twins.
– Blackjack was originally written as a female Pegasus.
– Blackbeard is now running around the modern day world thanks to Hermes’ vitamins
– Camp Half-Bloods address is the first four digits of pi.
– Chiron wears his horse tail in curlers
– Nico and Bianca were never technically claimed.
– The dam snack bar
– Several dozen Target stores across the country have arrows stuck in their signs from when Zoë shot them
– Percy knows how to ride/drive a motorcycle
– Travis Stoll got cursed by the Aphrodite cabin and was stuck wearing clown makeup for a month.
– Tyson and Grover were trapped in the Labyrinth together for over two weeks.
– Kampê is still buried in a mound of boulders in Camp Half Blood.
– Pollux is now Dionysus’s only child.
– May Castellan is still waiting for Luke to come home.