Yes, he does, in The Darkest Hour (book 6 of the first series).
Whitestorm was a senior warrior, meaning he had lots of experience. He was a supporter of Firestar when Firestar was deputy, and he had an unshakable faith in Starclan. When he was appointed deputy, Firestar commented that Whitestorm's surprise at getting the position was part of why he was chosen.
Brackenfur. She was his second apprentice after Tawnypelt.
Nobody knows yet because Firestar has not died yet but this answer will be changed as soon as Firestar dies and Brambleclaw, ahem, Bramblestar chooses the new deputy. (squirrelflight, which in my apinion is a horrible choice!)
Yes, Whitestorm mated with Willowpelt and together they had a litter of kits. Whitestorm is also the father of Sorreltail, Sootfur, and Rainwhisker.
Yes, Whitestorm and Bluestar are related. Whitestorm is the son of Snowfur and Thistleclaw, making him Bluestar's nephew.
Well when Tigerclaw gets banished Fireheart becomes deputy. He is then leader after Bluestar dies and he elects Whitestorm After White storm dies, he elects Graystripe. When Graystripe goes missing, Brambleclaw is elected. Brambleclaw is the current deputy. So the clan leader decides who takes over the deputy.
The ISBN of Master of Whitestorm is 0002239329.
Master of Whitestorm was created in 1992-04.
Master of Whitestorm has 400 pages.
Bone killed Whitestorm under Tigerstar's orders as a test of loyalty to the ShadowClan cats. Tigerstar manipulated Bone's loyalty to him and his desire for power to carry out the killing, furthering his own agenda to gain control over the Clans.
Ferncloud's father is Whitestorm, a noble and respected warrior of ThunderClan. Whitestorm played a significant role in the Clan and was known for his wisdom and dedication to his Clanmates.
Whitestorm's parents are Snowfur (Bluestar's sister) and Thistleclaw, as mentioned in Bluestar's Prophecy.