I LOVE THIS BOOK! THIS SERIES JUST GETS BETTER AND BETTER! BEST ONE SO FAR! I cannot wait for the fifth installment!
About the edition itself though... As someone that grew up reading British and Canadian books, often from the early part of the 20th century, I don't like American spelling. And it seems there are a lot of people like me. This book, and a few others, tries to combine some British spellings, but with American punctuation. Which does not work! There are massive typos. They could not figure out if it was realize or realise, and both appear- in fact anything with a z in American English and s in British. It was annoying.
I'd prefer the straight British edition, with single quotation marks for speech, and no periods after Mr and Mrs, etc. But even a straight American edition would have had fewer typos. Also, dumpster was randomly capitalized (Dumpster) in the middle of a sentence for no obvious reason.
I felt sorry for the copy editors and proof readers.