They have a series titled ‘Testing on the Toilet’. Each short article teaches something short about testing. They are short enough to be read while on the toilet, hence the title of the series. Apparently, at Google, they print them out and leave them in toilets so their employees have something to read.
Although I don’t plan on reading them while on the toilet they are really short and informative to read every now and again, or one each day, for example.
I suggest every developer should read some.