Actually, the rampant typos are almost certainly the result of crummy OCR (optical character recognition) and/or crummy file conversion. Files for print products, where you want stable pages going to the printer, versus files for eBooks, where you want to allow page breaking based on screen size or user-chosen font size, don’t play well together. That’s why I pretty much only buy fiction in eBook form, since the mathematical/technical books are generally unreadable.
