'Not that it matters' is a collection of Milne's early writing, a small selection of his articles between 1910 and 1912. The articles, or shall we say essays, vary on topics from chess, lunch, sorting one's library, snobbery, cricket, and alcohol. Really, you've got such differing themes and some that seem hardly worth an essay, like the goldfish. But you won't read this book for the topics themselves, you'll be reading it because it's Milne who discusses said topics. He has a skill in taking on basically any topic and turn it on its head, give you a comedic side of it, maybe question the obvious in it - to the point where he can actually make you think about things in new ways. Most of the time he is thoughtful, funny, and good at entertaining - while also notably capturing some of his contemporaries thoughts and feelings on the world. The context of his time is strongly woven into every single thing he writes, so that there are 'problems' or criticisms explored that would no longer have quite the same ring of relevance now as it did then. For example he talks of a 'dicky' (fake turtleneck) as being thought of as something disgraceful, in a longer discussion on class and how it's seen as lower class to be noticeably cheaper or lazier, than one's fellow man. While the sentiment might not be entirely gotten rid of, the specifics feels outdated for our current time. This is true for many of the essays; the central ideas often feel quite relevant, but some of the details feels like something lost in time, sometimes even a ring of nostalgia for things no longer in existence. But that is another point of charm for the modern reader, I would say.
All in all, if you are a Milne fan and you enjoy his writing, this is definitely something to get your hands on. While I definitely enjoyed Milne's autobiography immensely, the casualness of these essays - possibly as a consequence of it being early in his career as a writer - feels both fresh and all the more entertaining in light of his later works. The essays on book-related topics I found especially appealing; there's one about sorting one's personal library, another on author's names, yet another on writing and the monetary compensation for it. Actually there's a few essays on writing in particular, but then there's as mentioned before, many essays which discusses things like flowers, sports, architecture, weather, you name it. As a concluding note, quite the delight to read!