I know quite a few folk on here have kids, so this might be of interest?
This Kindle book is free for a limited time (possibly today only?).
*** Edit /update - not free anymore but more freebies in other post in this thread below. ***
Photographing Children - Tips, Tricks And Ideas! (On Target Photo Training) [Kindle Edition]
Dan Eitreim http://www.amazon.co.uk/gp/product/B007T07ZMK
Don't know if it's any good, but it's free.
Probably UK only but maybe you can download amazon.co.uk Kindle books from other EU countries, I don't know for sure though.
If you don't have a Kindle then there is a free Kindle app for iphone, ipod, Android and desktop (Mac or PC) etc.