[conductr]

Legal compliance is something you want to hire a professional service for. It changes too much. They can educate you on the risks of your specific field.

Pricing is a massive question with infinite possibilities. It usually needs to be tested, continuously. Or just locked in and changed on a regular cadence. A lot of it is going to do with you users and the value your product adds, or how that value is perceived. No book is going to answer this for you, just give you ideas of things to think about. Half of which will likely be N/A to your business.