Did you know that there's a vast archive of free information available to you which you can use to generate profits for yourself without having to spend too much? These are referred to as public domain information and these are basically anything that's no longer covered by US copyright laws thus making it available for anyone to use. This would include various works that were published before 1923 as well as some, under certain conditions, that were published up to 1978. They could range from music, photos, course books, instruction manuals, plays, movies and so on. Now, I'm sure you're wondering how you might be able to generate profits from these. Well, since they are in the public domain you can re-publish the information contained within them and then sell them in various forms. As a matter of fact, there are e-Books and whole businesses that were based on some of these free information and their owners make thousands of dollars each and every month for something that they got for very, very cheap. Since we are on the topic of information being a business, you should also know that the information industry is actually one of the most lucrative businesses any person can have. Think about it, there would always be a need for information and for someone who can provide it thus you would never run out of people to cater to.
There are some people who start their own information based businesses only to end up running into trouble because of 2 things. The first of which would be the fact that if they aren't familiar with public domain information, they are most likely to wind up writing the information for their business themselves which can be very tedious as it involves plenty of research and a whole lot of time. Second would be the easy way out. They need not do any writing or research because they could simply purchase the rights to another person's work and publish it under their name. This, however, would involve a significant amount of cash. But if you are smart, I'm sure you already know that the public information option is the best way to do it. Imagine having a business where the product is basically being handed to you for free or for a very cheap price and the best part is you get to keep 100% of the profits that you make. You need not pay anybody any royalty for every sale you make because no one holds the rights to what you're publishing thus the entirety of the profits go straight to your pockets.
You can publish anything based off of the public domain information that you would be able to get. You just have to think creatively and the ideas would come. The thing is that you don't have to copy straight the information as it is. You can get ideas from it and use the information you would get as a point of reference to help you get started. This would help you create a more updated and unique content. After all, the information is in the public domain and there are certainly a few other people who might be using it as well. So make sure to make it your own and keep everything up to date since these books were printed a long time ago their content is likely to have a few outdated bits.