Firstly, I’m delighted that so many of you enjoyed Avatars of the Intelligence very much.

“This is one of the only books I have been interested in for a while. I used to hate reading but ever since I read this book I have loved reading.” “I don’t think it could be any better.” Most of all I’m happy that you like my characters. People said some positive and perceptive things about Lucy – “I love Lucy’s character because she is strong-willed and determined (although a bit stubborn)” – but on the whole Hobo seems to be the favourite. “Hobo is a unique and original character who teaches us loads about alopecia and people who might not look like other people but are still really interesting and do good things.” “I particularly like Hobo. He is a character that shows how you can face bullies with a smile. Instead of shying away from comments about his alopecia he faces them head-on which makes him a really strong character in the book.”

A lot of you are interested in alopecia and the way I used my own experience of hair loss. “I really like how Sue takes something that happened in her life and turns it into something great.” I never thought of it that way when I was writing it but I’m happy for anyone to see the book in that light. Here, having already written two novels in which alopecia is the story, I wanted to introduce a clever, funny and individual character who just happens to have no hair. I also wanted to show that alopecia has made him stronger, kinder and wiser. As Ambassador for Alopecia UK I’ve met many young people with alopecia and that’s what it seems to do. Like all challenges it teaches people a lot about themselves and being human. “The book demonstrates how outcasts face challenges. Hobo is an extremely interesting character because he doesn’t fit into society’s expectations.”

A few people said the book starts slowly. The beginning of a novel is always the hardest part because there’s a lot to establish, especially in the kind of book that’s driven by character. It takes a while to get to know characters well enough to care, and it’s REALLY important to me that readers do care about mine. The first mysterious, creepy action is on page 13 but there are lots of sci-fi references before that to hint at what’s to come, and the emotional action starts on page one.

Two of you added that it’s a bit confusing at first with various characters named in the first few pages. That’s because, in this book which begins a series, we start with Lucy, but being a Lethbridge-Stewart she’s really the next in line: it’s in her blood. So unusually, I was handed a central character with a family tree, ready-made. I gave Lucy a personality, interests, strengths and weaknesses, but the Lethbridge-Stewart legacy is already established. There are many novels and short story collections published by Candy Jar about her grandfather, who even has a Wikipedia page! For the fans of that legacy, I had to acknowledge her family from the start; they’ll know at once who Conall is, and Nick, and all the family members. The book is meant to appeal to existing Whovians and fans of Lethbridge-Stewart, and some of its biggest fans so far are adult, like the guys who praised my book on a podcast for Doctor Who fans. But it’s also meant to appeal to readers from Y6 up, some of whom will come to it completely fresh, with none of this background. As a reader I’m always happy to wonder and deduce for a few pages before a relationship structure firms up, and by the end of chapter one those characters should all be clear. Using close third person means that I follow Lucy’s thoughts and perspective so people can’t be identified with labels, because she would think of Conall and Dean by name, not as her eldest, gay brother and his husband. I’ve written it so that readers can work all that out pretty quickly.

The colourful cover, which is the work of a Beano artist called Steve Beckett, really does appeal to Y5/6 readers – you should see them drawn to it in primary schools when I visit – and I hear that they enjoy the story, while teenage and adult readers will be more aware of the emotional dynamics and issues of diversity that some of you mentioned. I’ve been contacted by a father and daughter and a father and son who reported that both generations thought it was great. I came across a division into hard’ and ‘soft’ science fiction, and this book is definitely soft in the sense that it’s driven by character and its ‘science’ (in this author’s head, at any rate) is psychology rather than physics. I’d say this generally applies to Doctor Who, too, but some fans might like to challenge me on that.

You may have noticed that there’s plenty of imagery. It’s a playfulness with words and can give energy to a story, be fun or funny, crank up the excitement – sometimes in a horrifying way – and create an atmosphere. Sci-fi has its own vocabulary, of course, and like the action the language can be highly dramatic. It’s my thirty-first book but my first venture into this genre.