This has to be even better than the Ship Who Sings, for me.
Hypatia Cade, known as Tia to her friends, is the 7 year old daughter of a couple of archeologists, and she lives with them at their Esk Dig. Tia is an extremely bright, and emotionally stable child, and her best friend is a Brainship called Moira who, on visiting the Site just after Tia's birthday, gifts her with a wonderfully soft, blue bear, who is dressed in a Courier Service uniform.
Soon after Moira and her Brawn go off on their rounds of Digs again, Tia finds a junk site that she feels belongs with the Esk site that her parents are studying and, in order to save time, she collects a couple of samples, although one crumbles as she tries to move it, and she breathes in some of the dust.
A few weeks later, Tia has trouble with her feet, as they first start feeling prickly, and then slowly go numb. Because she doesn't want to disturb her parents in their important work, she consults the Medtech box in the site but, because she didn't know what had caused the problem, she didn't tell the Medtech, and it assumed she was going through a growth spurt.
As time goes on, and because her parents were working so many more long hours, that she didn't want to disturb them, it got to the point where her hands went numb too, and then the numbness crept up her legs and arms. It was only because her parents had a day off, and she stumbled in front of them, that they realised there was a problem, and so Tia was shipped out to a Central Worlds hospital where, eventually, whatever had caused her problem was stopped - but not before she was numb to her neck, and had become a quadriplegic.
Her Consultant, Doctor Kenny, who is a paraplegic - disabled through an accident - gets his friend, Lars, the Central Worlds Medstation Brain, to help him recommend Tia to the Shell programme, as her mind was still perfectly clear, and he hated the thought of her being stuck in a room for the rest of whatever life she might have left.
He knew that, if she were accepted as a Shellperson, she would have many, many more decades of life to live, with the choice of any job that she fancied.
Through Kenny and Lars' insistence, and Tia's natural character, even despite her age, she is accepted in to the programme and, on her graduation, accepts a job as a Brainship, to the Archeology and Exploration Service that her parents worked for. She was fitted as a Brainship, to work for A and E as a Courier Ship, just as her friend Moira was.
From then on, Tia chooses her Brawn, a man called Alexander, who was also an archeology buff, and their service life together begins.
They have many adventures, and discover many things, and the rest of the book tells all that happens to them, with all the same gentle humour, and love of people, that both Anne McCaffrey, and Mercedes Lackey, are capable of showing in their writing.
The fact that it's two of my most favourite of authors writing together, is definitely a bonus for me. And I both laughed, and also shed many a tear, in its reading.
Totally unputdownable!