One chapter a day is definitely the right way for me to read this book. Each contributing author wrote either a single ~4-page chapter anchored to a 5-year timespan, or a poem to follow a block of 8 chapters (i.e. 40 years). It starts with the first documented landing of a cargo of enslaved Africans to the colonies that would later become the United States, so naturally the material is often grim. I felt like I knew a lot about the slave trade and its associated depredations before, but I'm still learning a lot about its depths as I read. Reading a chapter a day is giving me space to let each one sink in without becoming overwhelmed.
Content warning Four Hundred Souls (CW: slavery)