The bigger packages
definitely get your more exposure for your book, and therefore are well worth the extra price, although there is certainly nothing wrong with their base level promotional options too.
Not exact matches
These are the areas where aluminum
exposure gets controversial and there is quite a bit of evidence supporting its possible link to these conditions, though
more research is
definitely needed.
If you're looking to not only
get more reviews but to boost the
exposure and sales of your book, then I would
definitely take the time to do this!