HBP (Snape's) old school textbook (his worst year ever)

[greenfirespike]

No: HPFGUIDX 137013



I was having a bit of trouble with the HBP book itself.  I read a few 
posts eariler discussing how the spell Harry uses against Draco could 
be the same one Snape uses against James in the Pensive.  Which got me 
thinking about a prior post discusisng, from what we see, the 
beginning of the HBP's potions book shows a student trying to become 
the best potions master they can.  It only appears later during the 
school year that the HPB (Snape) begins to create his own dark arts 
spells.  

Thus, are we to assume that, based off of what we see with the 
development of the HBP through Harry, that Snape's worst year would be 
his sixth year?  I assume this because I assume that Slughorn would 
use the same book for the same year as he did before.  Any thoughts?

Greenfirespike