What this means is background about the topic. NOT background on research accomplished so far. So, it provides more of the who what when where why of the topic. If you say you’re going to study contemporary student protests in Nigeria, for example, then in this section you’d sketch the recent history of student protests and the larger political/economic/social context they arise from on universities and more broadly. This section is hard to write because of course it could be a book in its own right, but it must be no more than about 2 paragraphs. But this is critical to show us the larger CONTEXT of the proposed topic, so that we see the proposed new research on that topic as being something both legitimate and interesting.
APA format offers guidance on more than just structure. It also advises you on the stylistics of your writing, specifically in your point of view and word choice. When writing in APA style, you can use first person point of view. APA style encourages that you write with the active voice, especially if your book features scientific data. Throughout your paper, clarity and conciseness are vital. Avoid unnecessary words or overly complex sentence structures. Focus your attention on the specific details. Instead of reviewing the book chapter by chapter, consider and describe the main themes. Include enough background information so your readers understand these themes and then present their strengths and weaknesses.