For those who would like to read Arp's Atlas of Peculiar Galaxies it is available free of charge in html on the web:
http://nedwww.ipac.caltech.edu/level5/Arp/frames.html
or you can download a pdf version:
http://nedwww.ipac.caltech.edu/level5/Arp/paper.pdf
Whilst it's not quite the same as holding a book in the hand, it at least makes the data available for anyone to consider. Other papers by Arp can be found
here. Enjoy!
Cheers, Dave.