Recommendation on a book on Early Commemorative Halfs

Commem's were plentiful at Long Beach, lots of ms66-67 high end GEMS..... What wonderful coins these are and each one has a tale to tell! Can anyone point Lucy towards a must have book concerning these wonderful creations of the US Mint.....

"Senorita HepKitty"
"I want a real cool Kitty from Hepcat City, to stay in step with me" - Bill Carter
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Comments
I reccomend the The Silver & Gold Commemorative Coins by Swiatek and Breen.
Hope this helps,
Rusty.
"United States Commemorative Coinage" (1975) - Arlie Slabaugh
"An Illustrated History Of U.S. Commemorative Coinage" (1967) - Don Taxay