I must beg to disagree with several of the reviews cited here.
No, there isn't much romance in Lady Knight. But surely this is a reflection of Kel's occupation with events. I don't think I'll be spoiling it for anyone if I mention that there is a war with Scanra. It was fairly inevitable. As such, Kel is pretty tied up with her all-consuming assignment, with very little time for romance. And I found the little hints about Dom (and Owen, though I may be paranoid) to be a quite intriguing; more so, perhaps, than out and out snogging, which is what you get with Alanna and Daine.
I thought Lady Knight was interesting and an amusing read. (That sounds condescending, but I'm avoiding using 'fun' as an adjective). The battle strategy, heavily used throughout the book, was fascinating, Pierce's trademark sly humour pervaded throughout, and many old favourite characters returned, including one of my personal favourites, Neal. Numair, Cleon, Dom, Quinden, Owen, Faleron, Raoul, Alanna, Baird, Merric, Wyldon, one of the hill bandits, Daine, Peachblossom, Hoshi and Roald all make appearances of varying lengths, and we are granted a blessed respite from Jon's arrogant presence. Buri, my very favourite character does not feature, although the epilogue mentions some interesting gossip on her situation! Added to this wonderful mix are some great new characters, including some difficult refugees.
Kel's character develops beautifully, and it is a joy to see, or rather, read.
The reason I have taken the 1/2 star off this marvellous book, however, is because of Cleon. Not giving too much away, I do not think Pierce dealt with Kel and Cleons' relationship adequately, but left poor Cleon out on a bit of a limb. (NB: This is not the same as 'not enough romance')
As for the ending, I found it more than conclusive enough. In real life, loose ends are not always tied up, and the protagonist doesn't always 'get' a true love. Pierce fans are just spoilt by Daine and Alannas' very satisfactory endings. I like this new method. As long as we hear more about Kel in future Tortall books, as we have about Alanna and Daine, I'm fine with this.
All in all a very satisfactory read, although reading the rest of the series first is a must.