I know this is not the forum, but well, hope it won't be banned. At least I always find answers here 
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I am a young project leader (Avanade speech) who want to improve not technically, I want to improve my human factor. My first project is going ok, but I want people to work more and harder (without using latigo:P). I would like to buy a book about motivation and group leadership. I just want to know which is the best one.
In my project people is going through differents moods, and I want to direct it if it is possible.
Thanks in advance.
book about group motivation and leadership
Alex Michael Leonard Klein
thanks for the response. But that isn't what i am looking for. I want something more psicological. People works better if they are happy and motivated.
I am agree with you in the smarter and better, you can save thousands of lines of code doing a good desing. But as more desing the client get more nervous, i don't know in your country, but in Spain clients want to view screens soon!!
I liked the project paralysis expression.
Novelle
I like this one, surely not the best but works
Agile and Iterative Development: A Manager's Guide
http://www.amazon.com/Agile-Iterative-Development-Managers-Guide/dp/0131111558/ref=pd_sim_b_5/002-6419709-9788012
An observation I want to make, creaturita, in my opinion is not a matter of working more and harder, but working smarter and better
I mean: working more does not necessarily implies achieving more goals (actually, trespassed certain threshold, the more you work the less you finish, until the project paralysis comes)
Anthony_HK
believe me that the book I suggested you has all to do about showing soon screens to the customer, despite it isn't about psicological aspects of team motivation you asked
(actually it has a good chapter about team building and role assignment but surely not from the perspective you asked)
Anyway, let's wait if someone else provides soon the guidance you need