First let me say I love the cover for this book. All the people connected with the shrine, including Mikage (yeah!) are shown and perfectly in character.
*Fangirl squeal and gushing time*
Oh, I want to hug this book and never let it go. This is the volume readers have been waiting for since the first volume. Frankly, you could end the series here and not be too broke up about there. Though there are still questions that deserve answers. Thankfully, volume 18 is coming out in June.
I won't say what happens because literally everything is a spoiler in here. I will say it was better then I could have imagined. All Nanami's time travels come together and I can't wait to see this in the anime! (Surely they'll make it this far in the anime?!)
If you like Inuyasha, I highly recommend this. It's very much a shoujo version, though it definitely goes it's own way. And it doesn't take 20+ volumes to get anywhere. Funimation's dub and distribution of the anime is also extremely good.
I'm off to rewatch Season 1 right now!