A Call to Duty is good in the sense it did Manages to do very well what Weber alone in his series does awesomely Blending the personal destinies of some characters in Defining historical moments of political relevance.
In this instance, the story of the two half-brothers, one a noble of Manticore, focused on solving internal problem of the Realm and the other a teen-ager finding his true calling in the Navy gives us The Possibility to see two sides of The problem of Manticore A short time after the plague and not even a hundred years after it Became a monarchy.
There is no Manticoran Junction, Manticore is at the end of nowhere, the neighborhood looks peaceful but nobody knows for sure.The only shining beacon of peace and civilization in the area is not (yet) Manticore but the Republic of Haven, a really nice touch Which fits with the backstory of the original series, Which Claimed That Haven was a beacon of civilization for a long time and ought to have kept being so, if the sabotage of the malign had not Brought the Legislature ists to power.
Albeit all personal issues about the Protagonists are solved in the book, on a strategic level it ends on a cliffhanger (well, actually two), I can not wait on part two to see how it evolves.
On a side note, the main protagonist, Travis Uriah Long So what the main protagonist of a short story in the latest Honoverse anthology (Beginnings), Story Happening later in the timeline, ... Hence it is not a spoiler to explain facts He survived. :)