Firstly, I'm not sure if you're aware but the term "black magic" can have a bit of a negative response. It associates a lot of practices people consider to be "evil" with practices traditionally led and used by black and other poc practitioners due to media representation and other factors, and it's wrong to insinuate that their practices are "evil" compared to more "positive" or lightly regarded practices. For this reason, a lot of people prefer to specify is at "left hand" or just specify the specific type of magic, which leads me to my next point.
The left hand path and similar areas are a wide range of topics. Imagine if someone came to you and said "do you have any information on math?" It's sort of similar. There is simply too much to offer with a request as broad as this. If you could narrow down what you're looking for specifically, I'm sure that there is a ton of information online and it would be a lot easier for users here to guide you towards it.
Magic is magic. The whole black magic/white magic classification is based on moral judgments placed on the magic being used by someone who often isn't involved in the situation. All magic works the same, you can adapt a spell for any purpose you have in mind. The same techniques are used, the ingredients, tools, and energy are all the same, the intention of the person casting the spell what changes it.
The idea of black and white magic is a mid-20th-century invention. When the last of the Witchcraft laws were repealed and people started to openly practice they had to fight the stigma of what a witch was. Since many believed that witches were consorts of the devil and only capable of causing harm modern witches had to promote their 'good' side to the broader world. This has caused confusion among many about what witchcraft is and what a witch can do.
If you are looking for specific books about causing harm, cursing, and the like you will be hard-pressed to find any that are published. You can create spells to suit your desired outcome and intention from the information that is widely available.
