Re: Who told Carol Marus that David died?
In addition to following Carol through TSFS and TVH, McIntyre also adds in some fairly substantial subplots about how Scotty's family deal with the death of Peter Preston (a fair more substantial character in the WoK book, thanks to his friendship with Saavik), in particular his Starfleet officer sister Dannan Stuart. She's not Kirk's biggest fan, to put it mildly (something like "When Kirk wants the Enterprise back, the captain dies to make room. First it was Decker, now it's Spock, but this time he got Peter killed in the crossfire...").
"Some days are better than others. They say that where I come from."
"Loudly, I imagine, on the day you left."
(Blake's 7 - Rumours of Death)