Im not sure about the words per minute, but i can write a book is around 8-12 hours time if i just sit down and focus on it
ive actually written 23 books this way, its really easy, you just have to let the words fall from your fingers...as stupid at that might sound
it was actually a goal of mine to see how many books i could write in a year...even better, i put them onto amazon and im actually making money from them everyday, gotta make goals and finish them !