Patent Books
There are many excellent books on patents, that provide in-depth information on the subject of patents and inventions.
See also Patent Law Books for a listing of books specifically on patent law.
Here are some good general patent books to start with:
Patent It Yourself: Your Step-by-Step Guide to Filing at the U.S. Patent Office
Patent It Yourself: Your Step-by-Step Guide to Filing at the U.S. Patent Office Kindle Edition
Patent Searching Made Easy: How to do Patent Searches on the Internet and in the Library
Nolo's Patents for Beginners Kindle Edition
How to Make Patent Drawings: A Patent It Yourself Companion
How to Make Patent Drawings: A 'Patent It Yourself' Companion Kindle Edition
Patent Pending in 24 Hours Kindle Edition
Patents. Simplified.: Entrepreneur's Guide To US Patents And Patent Applications (paperback)