Are there any?

Interesting, someone with access to the Internet but not Amazon :)

Perhaps the best books on the MacCutcheon are not books on the MacCutcheon...

Tim Harding: The Classical French (Batsford 1991)
W John Lutes: French MacCutcheon (Chess Enterprises 2001)
Steffen Pedersen: The Main Line French 3.Nc3 (Gambit 2001)
James Eade: Remember the MacCutcheon! (Chess Enterprises 2002)
Lev Psakhis:  French Defence -- Steinitz Classical and other systems (Batsford 2004)
Viktor Moskalenko: The Flexible French (New in Chess 2008)

Eade's is a great introduction, giving you a feel for the line in a way few opening books do by describing the emotional journey of his games, as well as throwing in a brisk summary of the theory (a book which deserves an exclamation point).  Psakhis' book is not exclusively a treatise on the Mac, but is as thorough and authoritative as one could wish.  And Lutes' is a neglected gem, throwing in a huge amount of antiquarian material on the French in general and a lot of non-English-language sources on the Mac.  He refrains from offering his own opinions as to the best routes, but provides you with the most detailed map of the terrain.  Lastly, Moskalenko's book is a passionate and partial look at the French, including a nice chapter on the Mac with lots of original suggestions.

Just for completenss, Byron Jacobs "French Classical" (Everyman 2001) includes 22 pages on the McCutcheon.

"How to play against 1.e4" includes a repertoire for black based in the McCutcheon, which, by the way, I really enjoy. 8-)

The 6.Be3 line is also in Watson's Dangerous Weapons book.

Look at previous posts

Justinhorton wrote on 11/14/06 at 16:12:05:

Are there any?

Not a book, but IMHO a very useful intro to the Mac for club players

recently produced by Dave Regis (aka Dr Dave on this forum).

http://www.exeterchessclub.org.uk/Handouts/supermac.htm