原書(げんしょ)original document (not a copy or adaptation), book in its original language (esp. a European language)

原書(げんしょ)のコピーをとる。

To take a copy of the original book. {original document (not a copy or adaptation), book in its original language (esp. a European language)}

この本(ほん)の原書(げんしょ)は英語(えいご)で書(か)かれています。

The original version of this book is written in English. {original document (not a copy or adaptation), book in its original language (esp. a European language)}

シェイクスピアを原書(げんしょ)で読(よ)むのは難(むずか)しいです。

Reading Shakespeare in the original text is difficult. {original document (not a copy or adaptation), book in its original language (esp. a European language)}

原書(げんしょ)は大切(たいせつ)に保管(ほかん)されてきたが、それにしても綺麗(きれい)すぎる。

The original book has been carefully preserved, but even so, it's too beautiful. {original document (not a copy or adaptation), book in its original language (esp. a European language)}

管理(かんり)者(しゃ)：「この原書(げんしょ)を展示(てんじ)するには、防弾(ぼうだん)ケースに入(い)れる必要(ひつよう)があります。」

Administrator: 'In order to display this original document, it needs to be put in a bulletproof case.' {original document (not a copy or adaptation), book in its original language (esp. a European language)}