Does an Incantatrix learn new spells per level?

Question

This may be something I'm just missing, but it seems by a strict reading, the Incantatrix (I also checked the Mystic Theurge, I'm assuming some of the other prestige classes), no longer get the two free spells per level known added to their spellbook. Is this the case? Would those fall under 'other benefits of that (base) class?'

An incantatrix continues to study standard magic as well as pursuing studies in metamagic. Thus, when a new incantatrix level is gained, the character gains new spells per day as if she had also gained a level in a spellcasting class she belonged to before becoming an incantatrix. She does not, however, gain any other benefit a character of that class would have gained (bonus metamagic or item creation feats, for example).

Answer 1

Technically, No.

You have already quoted the important information. Gaining new spells per day is not the same as learning new spells.

SRD for wizard states:

Spellbooks

At each new wizard level, she gains two new spells of any spell level or levels that she can cast (based on her new wizard level) for her spellbook. At any time, a wizard can also add spells found in other wizards’ spellbooks to her own.

Using Archmage for an example:

Spells per Day/Spells Known

When a new archmage level is gained, the character gains new spells per day (and spells known, if applicable) as if he had also gained a level in whatever arcane spellcasting class in which he could cast 7th-level spells before he added the prestige class level. He does not, however, gain any other benefit a character of that class would have gained.

But I haven't met any DM's that actually enforce that. I, as DM, don't enforce it either. Besides, even if you do enforce it, it isn't anything that can't be overcome with some gold and scrolls.

If access to that is difficult, then consider feats that adds spells to lists, and the Ancestral Relic feat that would allow you to pimp your spellbook.