Don't forget to visit and enter Chronicle Books' I Heart Guts giveaway, which ends this Friday -- five lucky winners will get a free plush heart, Spill Your Guts journal, I Heart Guts mix and match stationery set, stickers, and "I Work In Detox" liver lapel pin. All ya have to do is tell 'em your favorite organ and why and you're entered. Some of our favorite comments so far: "My bladder makes sure I never oversleep, it interrupts long road trips to keep them from getting boring, it gives you an excuse to inspect someone’s bathroom." AND "As a new dad, I have to go with the uterus! Due to a bit of (mis)fortune the doctor actually held up my wife’s uterus for me to “check out”. Umm, not such a pretty site. Thankfully, I have managed to replace that image in my mind with your adorable plushie." AND "I love the liver - it allows us to enjoy the finer things in life such as champagne, chocolate and hot chips. Sorry liver." Winners are picked at random, but we'll keep our guts crossed for your good fortune! NOTE: The contest is NOT ON THIS BLOG, it's right here on Chronicle Books' blog.