that ya'll get all of your teachings from and consider to be like scripture or anything?
No, her writings are not to considered as scripture... she was inspired by God to instruct the church on doctrine and to warn of events to come.
If so, what is the name of her book? Or are her teachings in many books?
She wrote many books... as a matter of fact, she is the most published female in literary history. During her lifetime she wrote more than 5,000 periodical articles and 40 books.
Do ya'll read any other Christian teacher/preacher's writings from any time period or just hers?
That would, of course, depend on the individual. Many Adventists have read other Adventist authors. Ellen White was not the only one that helped shape the doctrine of the SDA. Men like James White, J.N. Andrews, Joseph Bates, Uriah Smith, among many others. There are great publications today as well but one has to be wary of the apostasy that has crept in to spoil the original doctrinal belief, what we call the pillars and the foundation of our faith.
Do ya'll think she was a prophet? Do ya'll have female preachers?
Some, indeed, do consider her a prophet while others do not. Ellen White herself always just said she was a messenger from God. She never called herself a prophet. Personally, I consider her to have had the gift of prophesy, as she has foretold of what we are to expect in these last days. She was also sent to warn Gods' people about the time in which we are living, just like the prophets of old.
thanks