He doesn't die... As to how he became a vampire, he had Katherine's blood in his system when he died (his dad, Giuseppe Salvatore, shot him and Damon) in 1864.
I think you should read it after Vampire Diaries
If you read the first book Vampire Diaries, The Fury and Dark Reunion, The crow is Damon and Damon is Stefan's older brother. If you don't know Stefan, Stefan is the new kid in from Vampire Diaries.
she died saving Stefan an honorable way to die
If you mean in the Vampire Diaries she doesn't. She never died. She faked her death.
yes
Stefan Salvatore.
Stefan is a vampire, born in the Italian Renaissance during the late fifteenth century.
because he naturally is
stefan
Stefan doesn't die in any of the books but he has been captured and kidnapped many times in the book the Struggle and the Return volume one and two.
In "The Vampire Diaries," Lana never finds out that Stefan is a vampire as she is not a character in the series. You might be referring to Elena Gilbert. Elena discovers Stefan's vampire identity in Season 1, Episode 5, titled "You Are Invited." In this episode, she learns the truth about Stefan after a series of events lead her to confront him about his secret.
she's the vampire on the vampire diaries who turned both stefan and dameon into vampires.