Does your spell list ever feel... constrained? You're happy being a wizard, but you just wish you could learn a couple more cantrips and spells, and prepare a couple more. Would you be willing to sacrifice specialization for this versatility?
If the answer to these questions is a resounding "Sure," then you've come to the right place! Spell collectors aren't fancy, they just double down on wizard spellcasting with a no-nonsense approach. More cantrips, more spells known, more spells prepared! At higher levels they can cast a few spells they don't have prepared, copy offensive magic used against them, and eventually concentrate on two things at once... if they are willing to suffer disadvantage on all concentration checks while they do so.
- from the publisher's blurb