Bobbi Kristina Brown's devoted and outspoken aunt Leolah Brown has announced she has a new book coming out.

MORE: Bobbi Kristina died much like Whitney Houston did .. Bobbi Brown angry at autopsy release .. Bobbi Kristina was scarred and missing teeth, autopsy reveals 

Photo: Rodney Ho

Jennifer Brett

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Jennifer Brett

PAST COVERAGE:  Bobby Brown and his wife expecting again .. Bobby Brown's book deal ..  Bobbi Kristina's home is for sale ..  Bobby Brown says he could have saved Bobbi Kristina

Her brother Bobby Brown also has a book coming out.

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Jennifer Brett

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Jennifer Brett

Leolah has been effusive in sharing her thoughts and theories throughout her niece's hospitalization and after her death and takes issue with recently released autopsy findings. The Fulton County Medical Examiner's Office found the presence of "marijuana, alcohol (ethanol), benzoylecgonine (a cocaine-related substance), benzodiazepines (medications used for sedation or to treat anxiety), and morphine" during its investigation. It ruled that her cause of death was "immersion in water and drug intoxication."

The report is not entirely conclusive, though. Investigators don't know how Bobbi Kristina ended up in a bathtub, for example. "Death was clearly not due to natural causes, but the medical examiner has not been able to determine whether death was due to intentional or accidental causes, and has therefore classified the manner of death as Undetermined,” the Medical Examiner's statement concluded.

The autopsy also revealed Bobbi Kristina's body was scarred and missing teeth.

Leolah Brown is convinced her niece met with foul play and detailed her beliefs in an exhaustive social-media post:

Hear me and hear me good. Do not believe the sick, sad and disrespectful rumors about my niece dying of any drug use. They are nothing more than another way to trick you into believing such lies while covering up the actual facts of the truth! Furthermore, anyone trying to force you to believe this is a malicious, evil and deceiving devil! Make no mistake about it; my niece Bobbi Kristina did not die of any drug overdose nor anything pertaining to drugs."

The post goes on to proffer details regarding what Leolah believes happened to Bobbi Kristina.