Completely Different Title: Besides flat out renaming the book saga Game of Thrones instead of using A Song of Ice and Fire, the Vietnamese translations divide the five published original books into separate books:
A Game of Thrones - The Snow Wolves of Winterfell & King in the North
A Clash of Kings - Descendants of the Golden Lion & The Seven Kingdoms
A Storm of Swords - Return of the Others & Tears of the Snow Wolves & Death Wedding
The third book is a case of Fridge Brilliance and Woolseyism. Vietnamese borrows frequently from Chinese, especially for period pieces with fancy language. The characters for "purple" and "death" in Chinese are different, but can be read in the same way in Vietnamese: "tử". Tử Hôn, the name for the third part, can be understood as Purple Wedding, and Death Wedding - which is an apt name for the Red Wedding, and indeed, both weddings in that book are deadly.
A Feast for Crows - Feast of the Black Crows & The Prophecy
A Dance of Dragons - Awakening of the Sacred Dragons & The Siege of Meereen & Dance of the Sacred Dragonsnote "Sacred" is almost always added as a modifier when dragons are mentioned in Vietnamese, to keep the flow of the language, and because dragons are considered a symbol of royalty and religion to this day.
He admits that Arya is his favorite female character, and she's notably the only character in the entire series to get a POV in every book. She's also his wife's favorite, who's made him promise to keep Arya alive until the last book at least.
Development Gag: Near the end of A Feast for Crows, Littlefinger describes how quickly Cersei is destroying herself and how vexing it is for his plans, as he had hoped to have four or five quiet years before the next conflict ensues, which alludes to the Timeskip that Martin had previously planned between the third and fourth books.
Based on correspondence with GRRM, who refused to confirm that Rhaegar's son Aegon was killed during the Sack of King's Landing, some fans began to believe that it was a decoy that the Mountain snatched from Elia's hands and smashed against a wall. Guess who shows up in Tyrion's chapters? Although Tyrion himself is skeptical about the decoy story, leaving it ambiguous for now whether Aegon is a pretender or the real Aegon.
Also, in DVD Commentary for the TV show, GRRM confirmed that the undergaoler "Rugen" is one of Varys's disguises.
Fans had speculated for decades that Jon Snow is Rhaegar Targaryen and Lyanna Stark's son. This is confirmed in the Game of Thrones season 6 finale. Since it's public knowledge that the identity of Jon Snow's mother was the piece of information that got series showrunners David Benioff and Dan Weiss the job adapting the show in the first place, this has in turn all but confirmed it for the books as well.
Newbie Boom: While ASOIAF was always popular and acclaimed among dedicated fans of the High Fantasy genre, the Game of Thrones TV adaptation brought in a legion of new fans, many of which were eager to find out the differences between the show and its source material. Even among non-watchers of GoT, the newfound mainstream recognition of the franchise has given the books more readership and recognition.
A Dance With Dragons was "forthcoming" in one way or another starting in 2004, but was published at last on July 12th, 2011. Time will only tell if The Winds of Winter and A Dream of Spring will eventually fall under this trope, though Martin said in a 2014 interview with The BBC on an unrelated matternote An independent theatre Martin co-owns was one of several that decided to show The Interview after the Sony hacking mess. that he is still working on them.
The fourth Dunk and Egg novella, The She-Wolves of Winterfell, was originally intended to be published as part of the Dangerous Women anthology, but instead featured the The Princess and the Queen novella. Martin has also said he has notes for at least five more Dunk and Egg stories—one set in the Riverlands tentatively titled The Village Hero, and has teased the pair traveling to Essos at some point—in addition to She-Wolves, but has declared that work on any new Dunk and Egg stories is on hold until he finishes The Winds of Winter.
Schedule Slip: The series has notoriously suffered from it since around the turn of the century. One article even noted that every time he releases a preview chapter, it now feels more like getting a finger from a kidnap victim. This has now reached the point where you can count on quite a few fans to throw a fit whenever he's reported to be doing literally anything besides working on A Song of Ice of Fire. Some news stories even make tongue-in-cheek references to "things George R. R. Martin is doing instead of writing his books."
To summarise how badly the schedule has slipped with each release, the gap between the release of the first three books was two years each. The gap between A Storm of Swords and A Feast For Crows was five years. A Dance With Dragons came six years after that. Eleven years later there's still no concrete release date for The Winds of Winter, even though the entire Game of Thrones TV adaptation has come and gone from premiere to finale in the meantime, and first spin-off House of the Dragon has already completed its first season. If he doesn't manage to reverse the trend, then it's almost impossible to believe that A Dream of Spring will be completed in his lifetime because he's already well into his seventies.
Shrug of God: After the release fiasco that was A Dance with Dragons, Martin no longer risks giving a concrete estimate for when his next book will be finished. He has also remained frustratingly vague on whether he will wrap up the series in the next two books or if he will expand it to three or more.
Spin-Off Cookbook: There is A Feast of Ice and Fire, the official cookbook. One recipe is for Sansa's favourite lemon cake.
John: Hey, George. How's your writing going? George:[on Skype] I just killed three of your favorite characters. John: What?! It's not Arya, is it!? Give me a hint! It's not Arya, right?! George:[shrugs, resumes writing]