請將下面這段話翻譯成英文：

　　盡管圖書的種類多種多樣，但從本質上說，它們都可以被分為 兩大類,即紀實題材與小說題材。有時二者之間很難辨別，因 為許多小說都是圍繞著現實事件和真實人物來進行創作的。 紀實題材的書籍包括:歷史書，教科書，旅行手記，手冊指南 和自傳等。

　　參考翻譯：

　　There are many, many different types of books but, essentially, fliey come in two categories, fact or fiction. Sometimes it is hard to distinguish

　　between the two, because some fiction stories are mixed around true event and refer to real life people. The types of books that are included in the factual category are history books, text books, travel books, manuals and autobiographies.