Permissible and impermissible items of trade

Q: I want to sell physical health eBooks that may contain a few images of humans for the purposes of demonstration e.g. a fitness eBook demonstrating how to perform an exercise or movement. Both male and female images are found in the books and at times, a portion of the awrah of the males and females are exposed. However, this is for demonstrational and educational purposes.

What is the ruling on this and if I had earned wealth through selling these books, what is the status of my wealth, is it halaal or haraam?

Q: A common business practice amongst university students is to buy and sell their used textbooks amongst each other (as buying brand new textbooks from the publisher is extremely expensive).

1. Students, along with selling their textbooks, sell the notes that they made and the lecture slides (pdf version) for that module (subject) as part of one 'package'. Our question is regarding the permissibility of selling the lecture slides - which the lecturer uploads online during the course of the semester - as some naive first year students are unaware that they will be getting them for free over the course of the semester.

2. A lot of textbooks come in an ebook (pdf) format which the publisher sells online (also expensive). It is possible to find a 'pirated' copy of the ebook on the internet and download it. Students also sell these as well at a cheaper price.

2.1 Is this permissible?

2.2 If permissible (2.1), will one get thawaab if one distributes it to students for free instead of selling it to them?

Q: Is it permissible for a Muslim woman to sell English wedding clothes?

Q: Is it permissible for one to sell women's garments of western culture in one's shop?

Q: I would like to start a business. Since I'm very passionate about Islam, I want to start a business with an Islamic theme to an Islamic target (I am thinking of selling Islamic books or Islamic wall arts).

My question is, is it haraam to earn money from this type of business?

P.s. It is not that I want to profit from the fact that I am Muslim, rather I feel a big passion for Islam and if there is something that I would like to spend most of my time with, then it is Islam.

Q: Is it permissible to sell non prescription coloured contact lenses

Q: A fertlizer called amino acid is prepared from the hair of humans, dog or any other animal. So we are planning to buy hair from salons and then sell to this industries who make amino acid from hair. Is it permissible?

Q: If a person earned money through selling alcohol, can he use the money e.g. for funeral costs?

Q: Is a horse breeding business allowed in Islam?

Q: Is it permissible to own a pet store in Islam?