If you're looking for a digital version of Make: More Electronics or Make: Electronics, you'll be glad to know that O'Reilly is having a 50% sale this week. Here's the link. You'll also find some other books on the list, and I'm very curious about the Practical Electronics book... may try to grab that one and give it a look this weekend. If anyone has read it, let me know your thoughts.
Sale ends June 30 -- checkout code is WKECTRC.