This is a really good second volume of a series, if you boil it down to its core elements: The mix of action, humor and erotic scenes that worked well in the first volume is the same, which means that, just from a novel-puzzle-piece-perspective, if you liked the first volume, you will most likely like this volume as well.
What I really admire the author for is the following: In the beginning of the story, we got a lot of erotic scenes between various girls and Basara. This doesn't change at all in this volume, but the scenes feel more important, meaning that they have an importance to the overall storyline, that is the relationship triangel between his new stepsister Mio and his olf childhood friend Yuki, and the fight against those that want to take his beloved ones away from it.
Most of the plot of the first volume had been about establishsing the characters, their situation and the world they live in, and, ecchi and comedy scenes aside, there hasn't really been time for anything else but a weak, kind of forced climax to the story. Now this volume kicks into higher gears and not only makes you feel like something important and somehow meaningful is taking place in the world the characters life in (something that, I think, almost all light novels lack), but also chancges the pace in its world, and focuses more on things that are important, rather than giving you a broad picture of our hero's exploits in a wide space of time.
What I mean is, and I don`t consider this as a spoiler (write me a comment if you think otherwise), that about 40% of this book are a fight that was built up since ca. the half way mark of the book. 40 percent of a book for ONE single fight. The ending to this fight really felt meaningful, and as such is, I think, the first (maybe the second, now that I think about the ending of Shild Hero Vol. 1) scene in a light novel that doesn't fall into the light novel's pit of randomness and unimportantness that so many light novel authers seem to dig when writing a book.
Also thumbs up for Takigawa being best bro to a mc and a somewhat dubious and hard to predict double agent that could turn full villain every second. Have you ever seen such a character in another light novel? I haven't.
Long story short: This is one of the most enjoyable light novels I've read in my short reading career and I consider this the best japanese one of them. If you are a newcomer to this series, go check out the first volume, you can read it free online. If you are asking yourself if you should continue with the series after the first volume, do so - you'll get everything that was cool in the first volume, but more and better. (Though the food play is really getting out of hand. First cake frosting, now maple syrup, what the heck will come next? Mayonaise?)