The principal of my junior high, who was also a friend and neighbor, gave me a copy of this book for my fifteenth birthday. Useful throughout high school and college, and I still pull out my dog-eared copy when I have questions about how to format a particular style of letter, have questions about grammar, or need some general inspiration.
I have the 1990 paperback 1st edition. I am curious to see how this staple of my writing life has evolved. I understand there is now a .pdf on compiling multimedia reports on the Write Source 2000 website. Any basic book on writing, thinking, and learning that incorporates modern technology in this way definitely belongs on my shelf.
Update: I bought more recent, updated versions for both of my sons. They go to this resource all the time.