I raised the diaries, wanting him to take them, but Mr Tall still didn't touch them. "I'm not sure I understand," he said.

I pointed to the name – Darren Shan – scrawled across the front of the top copy, then to myself. Opening it, I let him see the date and the first few lines, then flicked forward to where it described my visit to the Cirque Du Freak and what had happened. When he'd read the part where I told about watching Steve from the balcony, I pointed up and shook my head hard.

"Oh," Mr Tall chuckled. "I see. Evanna not only saved your soul – she gave the old you his normal life back."

I smiled, pleased he finally understood. I closed the diary, tapped the cover, then offered the books to him again. This time he took them.

"Your plan is clear to me now," he said softly. "You want the world to know of this, but not yet. You are right – to reveal it now would be to risk unleashing the hounds of chaos. But if it's released later, around the time when you died, it could affect only the present and the future."

Mr Tall's hands moved very swiftly and the diaries disappeared. "I will keep them safe until the time is right," he said. "Then I will send them to… who? An author? A publisher? The person you have become?"

I nodded quickly when he said that.

"Very well," he said. "I cannot say what he will do with these – he might consider them a hoax, or not understand what you want of him – but I'll do as you request." He started to close the door, then paused. "In this time, of course, I do not know you, and now that you have removed yourself from your original timeline, I never shall. But I sense we were friends." He put out a hand and we shook. Mr Tall only very rarely shook hands. "Good luck to you, friend," he whispered. "Good luck to us all." Then he quickly broke contact and closed the door, leaving me to retire, find a nice quiet spot where I could be alone – and die.

I now know why Evanna commented on Mr Tiny not being a reader. He has nothing to do with books. He doesn't pay attention to novels or other works of fiction. If, many years from now, an adult Darren Shan comes along and publishes a series of books about vampires, Mr Tiny won't know about it. His attention will be focused elsewhere. The books will come out and be read, and even though vampires aren't avid readers, word will surely trickle back to them.

As the War of the Scars comes to a wary pause and leaders on both sides try to forge a new era of peace, my diaries will – with the luck of the vampires – hit book shops around the world. Vampires and vampaneze will be able to read my story (or have it read to them if they're illiterate). They'll discover more about Mr Tiny than they ever imagined. They'll see precisely how much of a meddler he really is, and learn of his plans for a desolate future world. Armed with that knowledge, and united by the birth of Evanna's children, I'm certain they'll band together and do all they can to stop him.

Mr Tall will send my diaries to the grown Darren Shan. I don't imagine he'll add any notes or instructions of his own – he dare not meddle with the past in that way. It's possible the adult me will dismiss the diaries, write them off as a bizarre con job, and do nothing with them. But knowing me the way I do (now that sounds weird!), I think, once he's read them, he'll take them at face value. I like to believe I always had an open mind.

If the adult me reads the diaries all the way to the end, and believes they're real, he'll know what to do. Rewrite them, fiddle with the names so as not to draw unwelcome attention to the real people involved, rework the facts into a story, cut out the duller entries, fictionalize it a bit, create an action-packed adventure. And then, when he's done all that – sell it! Find an agent and publisher. Pretend it's a work of fantasy. Get it published. Promote it hard. Sell it to as many countries as he can, to spread the word and increase the chances of the story capturing the attention of vampires and vampaneze.

Am I being realistic? There's a big difference between a diary and a novel. Will the human Darren Shan have the ability to draw readers in and spin a tale which keeps them hooked? Will he be able to write a series of novels strong enough to attract the attention of the children of the night? I don't know. I was pretty good at writing stories when I was younger, but there's no way of knowing what I'll be like when I grow up. Maybe I won't read any more. Maybe I won't want to or be able to write.

But I've got to hope for the best. Freed from his dark destiny, I've got to hope the young me keeps on reading and writing. If the luck of the vampires is really with me (with us) maybe that Darren will become a writer even before Mr Tall sends the package to him. That would be perfect, if he was already an author. He could put the story of my life out as just another of his imaginative works, then get on with writing his own stuff, and nobody – except those actually involved in the War of the Scars – would ever know the difference.

Maybe I'm just dreaming. But it could happen. I'm proof that stranger things have taken place. So I say: Go for it, Darren! Follow your dreams. Take your ideas and run with them. Work hard. Learn to write well. I'll be waiting for you up ahead if you do, with the weirdest, twistiest story you've ever heard. Words have the power to alter the future and change the world. I think, together, we can find the right words. I can even, now that I think about it, suggest a first line for the book, to start you out on the long and winding road, perhaps something along the lines of, "I've always been fascinated by spiders…"

I'm on the roof of the old cinema, lying on my back, studying the beautiful sky. Dawn is close. Thin clouds drift slowly across the lightening horizon. I can feel myself coming undone. It won't be much longer now.

I'm not one hundred per cent sure how Mr Tiny's resurrection process works, but I think I understand enough of it to know what's going on. Harkat was created from the remains of Kurda Smahlt. Mr Tiny took Kurda's corpse and used it to create a Little Person. He then returned Harkat to the past. Harkat and Kurda shouldn't have been able to exist simultaneously. A soul can't normally share two bodies at the same time. One should have given way for the other. As the original, Kurda had the automatic right to life, so Harkat's body should have started to unravel, as it did when Kurda was fished out of the Lake of Souls all those years later.

But it didn't. Harkat survived for several years in the same time zone as Kurda. That makes me assume that Mr Tiny has the power to protect his Little People, at least for a while, even if he sends them back to a time when their original forms are still alive.

But he didn't bother to protect me when he sent me back. So one of the bodies has to go – this one. But I'm not moaning. I'm OK with my brief spell as a Little Person. In fact, the shortness of this life is the whole point! It's how Evanna has freed me.

When Kurda was facing death for the second time, Mr Tiny told him that his spirit wouldn't return to the Lake – it would depart this realm. By dying now, my soul – like Kurda's – will fly immediately to Paradise. I suppose it's a bit like not passing "Go" on a Monopoly board and going straight to jail, except in this case "Go" is the Lake of Souls and "jail" is the afterlife.

I feel exceptionally light, as though I weigh almost nothing. The sensation is increasing by the moment. My body's fading away, dissolving. But not like in the green pool of liquid in Mr Tiny's cave. This is a gentle, painless dissolve, as though some great force is unstitching me, using a pair of magical knitting needles to pick my flesh and bones apart, strand by strand, knot by knot.