Lev Bezymenski's book 'The Death of Adolf Hitler' is worth a read.
It comes with some caveats due to it's roots in the Soviet era but has a real flavour of the events surrounding the hunt for Hitler's corpse and the autopsies of the various remains found at the bunker (from Hitler himself to the Goebbels children) from one who was present and at the centre of the business. There's a sense of a great deal of pressure from above causing some sloppiness in the recording of death/deaths but the essential basis of his tale convinces.
There are later more comprehensively researched books that do better at tying up loose ends, but Bezymenski's is the one that stuck with me.

Cheers,
Adam.

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"Wars cannot be fought with dream stuff" - Sir Percy Hobart.