I originally purchased Harry Potter and the Chamber of Secrets in a bookstore in London when I was in medical school. My medical school here in Philadelphia offered a month-long rotation at London's St. Christopher's Hospice working as a nurses' aide, doing all the things nurses' aides typically do.
And so, the first time I read the second Harry Potter book, I was on an overnight ferry travelling from London to Dublin, Ireland for Easter weekend.
I thought I had read CoS once or twice since then, but still, most of the details of the story were unfamiliar on this reading. Suffice it to say that I did remember where the chamber was located, who opened it, and with what instrument, but I won't spoil the details here. I didn't remember the specific events leading up to that or how it played out. I did remember that Harry speaks snake, but that has been a theme throughout the other HP books. Otherwise, much of the details of the book felt unfamiliar to me.
I guess the story somehow paled in comparison to my first trip to Europe in which my friend and I spent a month in London at the hospice helping care for dying patients and another month travelling around the continent to Portugal, Spain, England, Ireland, Wales, Scotland, France, and Switzerland. I read the third Harry Potter book on the way back to London from Dublin, so I'm sure that will feel unfamiliar as I read it again as well.