This letter complains to a travel book that the information about a certain city, restaurant, etc. is incorrect.
1234, Main Street
Boston, MA 02123
01 April, 2005
<Recipient Address Goes Here>
I understand that it's difficult to keep your guidebooks up-to-date on every facet of every country from year to year, but the kind of glaring errors that <travelers> found on <my/our> trip to <location of trip> are pretty hard to take.
<I/We> use travel guides frequently on our trips around the world. If you would like <me/us> to continue using yours, I would suggest you make an effort to keep the information current. Thank you.
encl: <List of enclosed items goes here>