The ebook version of Code Complete 2nd Ed. is currently on sale at O’Reilly. The code ‘DDC2E’ will get you 50% off - $20 instead of $40.
I’ve never read it before, but I’ve always heard a lot of praise for it on Stack Overflow so I went ahead and bought it. It’s also worth noting that after purchase, you get a further 40% discount on the print edition if you buy it through O’Reilly too.
This is apparently a one day only sale, and it appeared on Twitter over 8 hours ago, so it probably doesn’t have too long left.