I'm looking for a book (probably published five or more years ago)
about people whose talents emerged late in life.

Hi clio2,

Here you go:

Late Bloomers by Brendan Gill.
Published by Artisan in 1996.
Paperback: ISBN: 1579651089
Hardcover: ISBN: 1885183488

You can view the covers and some interior pages here:
http://www.amazon.com/exec/obidos/tg/detail/-/1579651089/ref=lib_dp_TFCV/104-3756324-1126364?v=glance&s=books&vi=reader#reader-link

There are many used copies available. A good place for price
comparisons is bookfinder.com, however it often doesn't bring up all
of the results. To be sure, it's best to search at all of the
individual sites.
http://www.bookfinder.com/search/?author=gill&title=late+bloomers&new_used=*&binding=*&isbn=&keywords=&minprice=&maxprice=&classic=on&submit=Begin+Search&currency=USD&mode=advanced&st=sr&ac=qr

Ditto for:
http://used.addall.com/SuperRare/submitRare.cgi?author=gill&title=late+bloomers&keyword=&isbn=&order=TITLE&ordering=ASC&dispCurr=USD&binding=Any+Binding&min=&max=&timeout=20&match=Y&StoreAbebooks=on&StoreAlibris=on&StoreAntiqbook=on&StoreBibliology=on&StoreBiblion=on&StoreBibliophile=on&StoreBibliopoly=on&StoreBiblioroom=on&StoreChapitre=on&StoreElephantbooks=on&StoreHalf=on&StoreILAB=on&StoreMare
agnum=on&StorePowells=on


Here is an example of what is available at abebooks.com:

Paperback:
New York: Artisan, 1996. 
Near Fine. Tight, clean copy.
ISBN: 1579651089
Price: US$ 1.99
http://dogbert.abebooks.com/servlet/BookDetailsPL?bi=180456730

Hardcover:
Artisan New York, NY, U.S.A. 1996 
As New/Near New. First Printing. Hard Cover. 
Glimpses into the lives of folks who made their marks in their latter
years. Very inspiring! Book and DJ are very nice.
ISBN: 1885183488
Price: US$ 5.95
http://dogbert.abebooks.com/servlet/BookDetailsPL?bi=139727846

I'm happy to be able to help - if you have any questions, or if this
isn't the book you are looking for, please post a clarification before
rating my answer.

Thank you,
hummer

Search Strategy:
keywords: success aging
at book sites

Just what I was looking for - and speedy

Hi clio2,

Thank you for the fine rating and tip - quite nice.

Glad to hear you've found your book, I hope you enjoy it.

Sincerely,
hummer