"When faced with a legal problem or question, a recent textbook on that subject is the most convenient and practical way to get a summary discussion of the legal principles that apply to that issue. The author (or authors) provides an exposition of the law with reference to relevant constitutional and statutory principles, the common law, judicial precedent , customs, customary law, international law and foreign law.
When deciding whether to consider a particular book, it is imperative to consider the date of the publication. As laws develop and change, books may become outdated and lose their relevance. This is why textbooks periodically have newer editions published. This is the only way to keep the publication relevant in that field of study". Meintjies-Van der Walt Introduction to South African Law (2019) 174