Is there some way to tell what age-group a posted book is targeted for?  I really don't want to request a juvenile book, for instance (I am 60...BTDT....LOL).

I would look it up on Amazon myself to see.

I don't think they usually specify unless it's for children or teens.  I think adults are just grouped into one lump. 

I've noticed that some have YA on them.  (Young Adults?)

Look at the categories at the bottom of the book page.  It will tell you what the book is indexed under.  These are where the book shows up in the book search groups.  But remember, these are only as good as we post and edit them to be.

Some of the best books I've ever read were meant for a younger audience.  Don't avoid them just because you think you are too old.  :-)

My 75 year old grandmother reads "teen" books that I bring her.

Books are for everyone. There is no age limit!