The use of pseudonyms in writing has long been widespread, as authors seek to conceal from the public eye their true identities. A pseudonym is a fake or pen name used when writing and publishing to protect one's identity or increase the chances of success. Pseudonyms are used for many other reasons, and many notable writers are more known by their pen names or pseudonyms than by their real ones.
Not every author wants to have their true identity in the public domain, and for a good reason. For example, if you have written a literary work that exposes your heart and soul, pouring out emotions or events perhaps never shared with anyone before, then indeed it may make sense to want to use a pen name. The pseudonym protects your innermost self from family, friends, and critics.
Another good reason to use a pseudonym is having a difficult name to spell. If your real name contains several uncommon consonants or a half-dozen syllables, perhaps a shorter and easier to spell name would be best for your book. In addition, if the average reader has difficulty pronouncing your name correctly, a pen name might be a good option for you.
Perhaps you have already been published, but the sales of your first work did not take off, and you fear this failure might dampen interest in your new book. In this case, it might be a good idea to use a pen name, as that could help ensure that the sales of the new book would be on its merits alone, breaking the negative association with the previous work. A new name gives you another chance to release and publish work with a fresh start, bypassing the possibility that your writing might be rejected upon readers seeing your real name.
As an author, you may share a name with another well-known author or famous literary character. For example, in the United States, the name “James Patterson” might be used by over 4,000 people, and that might cause much confusion if your book carries the same name. Alternatively, you may have an extremely common name. In such a situation, you might want to use a pen name that is less common and more memorable.
Using a pseudonym also gives you anonymity. In the age of the all-encompassing worldwide web, many people want to remain anonymous. Social media is all the rage today, and if you wish to retain any semblance of privacy, using a pseudonym is recommended. Many writers also use a pen name to protect themselves from persecution for airing controversial or radical views. Others seek to protect family members and close friends from being linked with their known personas. A politician may want to keep certain writing from the public, family, or supporters.
If you are a prolific writer or write in different genres, it may be wise to use other names. Your loyal fan base might not cope with your output if you crank out works too often. Your readers may become weary about your intentions, or begin to question the quality of your work. A pen name might work to keep book sales strong, creating a new fan base in the process.