Does anyone know what the books are being used for?
The question is NOT relevant the only question that is relevant is what money did she use(PAC MONEY) and did she (PERSONALLY) profit from the sale of those books. This is all that matters, she took money donated to a CAUSE (Sarah PAC) and used it to ENRICH (SARAH). I'm sorry but if I had donated money I would be PISSED and would demand EVERY CENT of my money be returned to me (WITH INTEREST)!
Actually it is perfectly relevant.
A PAC is a fundraising organization. Fundraising organizations/Non-profits Market themselves like any other organization or corporate entity.
The books could very well be being used in a fundraiser...such as sold at speaking engagements. With the money raised in those sales to benefit the PAC.