The literary agent Janet Reid has compiled a handy chart. Here’s the start of it:
…………………………………………….Fiction……….Memoir……..Non-fiction
query letter ………………………………yes,,,,,,,,,,,,,,,yes………….. yes
website* ………………………………….yes,,,,,,,,,,,,,,,yes…………..yes
dedicated query/author email,,,,,,,yes………… ,,,yes………. ….yes
word count……………………………….yes,,,,,,,,,,,,,,,yes………….. no
Check out the rest.