private string CreateBookRecord()
{
Login();
string bookInstanceId = Guid.NewGuid().ToString();
var title = "unittest" + bookInstanceId;
var result = _client.CreateBookRecord(string.Format("{{\"bookInstanceId\":\"{0}\",\"title\":\"{1}\",{2}}}", bookInstanceId, title, _client.UploaderJsonString));
Assert.AreEqual(HttpStatusCode.Created, result.StatusCode);
return bookInstanceId;
}