Pls frends,how Can I have all the webpages I visited to be available when am offline.

Hello Friends, I ve been studying a number of articles, books and turorials from a number of websites on the internet, but the problem is when i go offline, I wouldn't be able to study again till am online again. please is there any way I can quickly save all the pages I ever visited so I can still view them when am offline. apart from saving them one by one which could be stressful and uneasy. or is there any software that could help me do this quickly. expecting your reply. thanks in anticipation.