This book is available for purchase for $10 (plus tax where applicable) with iBooks on your Mac or iOS device, and with iTunes on your computer. Books can be read with iBooks on your iPad or Mac with OS X Mavericks and above. You can also purchase the Adobe PDF edition of the e-book for use on PCs and Android devices. It costs $10 also. Both versions are DRM-free, fully searchable, and you can cut-and-paste and print it. The iBooks edition is only available in 51 countries, so if you do not see the Apple iBooks logo below, your only option is the PDF edition. Note that the PDF version is distributed by Gumroad LLC, so their name will appear on your credit card statement.