Long ago Thunderclan, Windclan, Riverclan, and Shadowclan drove Skyclan away because of the Four Trees. They thought Starclan was unhappy with them because of the fifth clan.
Echosong joined SkyClan because she kept on having dreams about SkyClan's ancestors. Although Echosong is the medicine cat of SkyClan she has no SkyClan ancestry.
I doubt it.
Yes, and it is called Skyclan's Destiny.
Yes. Echosong is medicine cat of Skyclan.
its Starclan and maybe.
She is the leader of the modern Skyclan :)
The ISBN of SkyClan's Destiny is 9780061699948.
We will find out in Skyclan's Destiny.
SkyClan's Destiny has 462 pages.
SkyClan's Destiny was created on 2010-08-03.
Because of the extreme distances between Skyclan and the other clans, this is not likely. However, there will be a special edition called Skyclan's Destiny.
You need to look up Erin Hunter. I am not familiar with the Warrior series and Skyclan so you will find the information you need at the link below.