The combination of inexpensive home computers, the Internet and the creativity of its users has led to new forms of fiction, such as interactive computer games or computer-generated comics. The Internet is also used for the development of blog fiction, where a story is delivered through a blog either as flash fiction or serial blog, and collaborative fiction, where a story is written sequentially by different authors, or the entire text can be revised by anyone using a wiki. The Internet has also had a major impact on the creation and distribution of fiction, calling into question the feasibility of copyright as a means to ensure royalties are paid to copyright holders. Also, digital libraries such as Project Gutenberg make public domain texts more readily available. Countless forums for fan fiction can be found online, where loyal followers of specific fictional realms create and distribute derivative stories.