I came to the party late on seeing "Year-Round Gardening" by Delilah Smittle and Sheri Ann Richerson - it was published and widely reviewed last year.
But, it is still worth talking about because it is terrific.
The authors have written an all-you-need-to-know paperback that will be appreciated by new gardeners of all ages.
Even if you do not have a need or desire to garden year-round, this is one of the best books I've seen on basic growing techniques.
It covers every one of the topics a new gardener needs to consider and it is clearly written without being dumbed down (despite the "Idiot" in the title). Each subject is covered in enough depth to get you through the first few years of gardening.
"Year-Round Gardening" is in the usual "Idiot" format: black and white on newsprint, with boxes of tips scattered on the pages.
Take a look at it next time you are in a bookstore. Used copies are only a penny on Amazon. Buy one for yourself or a young gardener in your life.