There's a good manual
HERE. All it lacks is some answers for the aphrodite statue in the catacombs, which you could find
HERE
As for the black knight, you must make sure his lance DOESN'T hit your shield. As for your lance, well, you must put it in the center, and when the black knight wants to block, you move it to the left or right.
And when fighting the saracen, use
7 8 9
4 5 6
1 2 3
for
strong high attack | block high | high attack
go back | block middle | middle attack
strong low attack | block low | low attack
. I'm telling you, first block the saracen until he's tired, then hit him little after little.