Indeed well worth a read even this long after it was published.
Interesting to note that submarine cables played a significant part in the plot of Cryptonomicon by Neal Stephenson.
Cyrus Field's Big Dream: The Daring Effort to Lay the First Transatlantic Telegraph Cable
For a slightly wider take, Arthur C. Clarke's "How the world was one" is a most readable account of how telecommunications has made the world smaller, starting with the first submarine cables, proceeding with satellites (of course he would!) before devoting a section to fibre optics at the end. Brilliant account.
I did the tour a few year ago, run be retired engineer who was enthusiastic and excellent at explaining the difficulties in getting it all working.
As an added bonus, old school html:
Someone gave it to me at a previous job but never left a note to say who so I couldn't thank them.
(It's a expression, but I'm sure someone else will get it :) )