Some books I produce for my own benefit, but shared here, and sometimes updated. Of course, you'll need an iPad to read them. Oh, and by the way, if you don't like them, I'll refund what you paid me in full!
Photography Essentials - more an experiment of what iBooks can do
Simon's Recipes - my favourite recipes - Last updated July 2012
Ukulele - Ukulele Tabs and some blog articles - and as a PDF (not optimal) - Last updated October 2012