They already made lots of Warriors books! I have most of them! :D
Erin Hunter is four diffrent people. I'm unsure which of the authers wrote the first book but I do know it was in 2003. It was published for people to read in 2003
No but they can make the cats in Warriors harsh.
On February 7th
Because we do not know what the last warriors book will be, it is impossible to know when it will come out. Although, if you mean the last book in the Omen of the Stars, that is coming out on April 2nd, 2012. For the series Warriors, the New Prophecy, and Power of Three, those are already out. Erin Hunter has concluded they will make a 5th series
So far they have made four but Erin Hunter has said that there might be six or more.
Yes, the new series after Omen of the Stars is called Dawn of the Clans.
She has made SkyClan's Destiny, but I think that that is it. She may make more in the future. You never know :D
never
Not currently--right now she is working on a dog series called Survivors, as well as Warriors (cats) and Seekers (bears)
The warriors website contains FAQs, but there is no way to actually ask a question on the website. There is a section of the official warriors forums though devoted to questions for Erin Hunter. You can also ask questions on Vicky Holmes' (one of the Erin Hunter's) Facebook page.
If your planning to publish the book or enter it in a contest and it contains words like "Thunderclan" or names like "Lionblaze" you need written permission. It is perfectly OK to write your own "Warrior" book for fun as long as you don't make profits off it and the book isn't "copyrighted"
Pinestar and Leapordfoot are the parents of Tigerstar. It was also Thistleclaw who happened to make Tigerstar more ferocious due to Thistleclaws' dark forest training