The specific facts and details of the case need to be discussed with legal counsel. We can't offer anything here without knowing what was said, how...

I would take your own photos to avoid issues. If the photo is just a facsimile of the item itself and is absent of any other creative expression...

Can I be sued on this matter?

As the others note, this is really a fact intensive scenario. It would seem at first blush, without making any conclusions, that the partnership...

Can I ask for personal experiences to compile for a book and not have to compensate every person that submits their story?

You should have proper terms created for them to agree to beforehand. This will eliminate your concerns and avoid intellectual property rights...

Is it legal to post an outline on a website using the information I have retained from textbooks utilized over the years?

Copyright affixes to creative expression not information itself or facts. So long as you are expressing the information without infringing you...

A DBA registration would not be needed for what you describe so long as it is clear that any business is being done by the underlying LLC. When...

That could definitely be an issue. If you run a basic search at the USPTO for "UBER" it calls up close to 500 results. So there are numerous uses....

Can I sue for trademark infringement for other business which has similar name to our brand?

Suing them is going to cost you tens of thousands. So that is the last resort. You will first need to know if they were using the name first and...

High Profile celebrity....used my concept...content...speech and analogy...then named his book after of my concept..

If you have serious concerns about infringement, I suggest that you consult with a lawyer in private and discuss your best course of action in more...

When associating with fandom items what is legal and what is off limits?

You seem like you have a good grasp of the legal issues at large. The only thing you can do at this point is to seek out specific legal advice...