Copyright exists in an item as soon as it is rendered into "permanent" form. The copyright symbol (Â©) is not needed, although placing it does give the copyright owner an easier time when trying to legally enforce a copyright infringement claim in the US.
Before 1978, the symbol was needed to establish copyright under US law. Before about 1960, if you neglected to include the copyright symbol in a published work, it went immediately to the Public Domain. After about 1960, there was a way to remedy that defect, but anything published without the copyright symbol in the US before then was and is free to anyone to use as they see fit.
You can optionally use the symbol any time you are the author of the work. You MUST use the copyright symbol if you are making a copy of any work that has the copyright symbol upon it.
&copy; or &#0169;
You can find it in the Character Map... Click start > All programs > Accessories > System tools > Character map. You should find the copyright symbol just before the capital A. You can copy & paste the symbol into your documents.
copy this into doc ©
You automatically have copyright of any material that you write, providing you use the symbol (c) with the date and your name.
Without a keypad you will have to open the character map, select the © copyright symbol or one of the ® ™ trademark symbols and do a copy+paste to your document.
There are three ways to get the © symbol in a Windows PC.1) You can copy/paste from the character map2) Engage the number lock & while holding down the key hit 0-1-6-9 on the keypad.3) You can copy/paste the © symbol from this answer
You have infringed their copyright, and they have the right to sue you. Your best move is to destroy the copy, or ask for permission to have made the copy.
If something is copyright, then it is illegal to copy it without paying the owner of the copyright. The other benefit is that no one can copy your work. So the main benefit is money if someone wants to make a copy. If no one wants to purchase a copy, there is no benefit.
If you have a copy of the book, there will be copyright information on one of the very first pages in the book; probably before any preface, foreword or contents pages. If you don't have a copy, call the reference desk at your local public library and inquire.