Between the First Endarkened War (the one Vieliessar is fighting), and the Second Endarkened War is roughly 10,000 years. From there to Kellen's time is, I believe we established, another thousand years.
An Unbonded dragon is immortal; in Bonding, they link their lifespans to those of their Bondmates. Since Ancaladar was Unbonded until he met Jermayan (we'll leave out the comming of the time when Three Become One, which effectively increases a dragon's natural lifespan infinitely), he could certainly be far older than eleven thousand years. And we might even find out in a book or two...
As for the process of co-writing a book with Ms. Lackey, I have to say it's very smooth. Generally we work out the plot and the outline together, and post sections to each other as we write them. I assemble them and do the final and revision drafts.
Re: Two random questions
An Unbonded dragon is immortal; in Bonding, they link their lifespans to those of their Bondmates. Since Ancaladar was Unbonded until he met Jermayan (we'll leave out the comming of the time when Three Become One, which effectively increases a dragon's natural lifespan infinitely), he could certainly be far older than eleven thousand years. And we might even find out in a book or two...
As for the process of co-writing a book with Ms. Lackey, I have to say it's very smooth. Generally we work out the plot and the outline together, and post sections to each other as we write them. I assemble them and do the final and revision drafts.