I've just read Edgar Allan Poe: um homem em sua sombra, and I wished to share my opinion with you, folks.
Although this book presents quite important aspects of Poe's life, it doesn't have an organized timeline. In this sense, I suggest you to read the work of Ivan Schmidt, who also researched previous Poe's biografies such as Hervey Allen's for instance. The countless footnotes are also problematic. The reading becomes tiring and our attention can be easily distracted. On the other hand, the author presents good analysis of "The Raven" and other Poe's works.