Stan Lee's How to write comics is a fair to middling book at best. If your seeking a creative writing book that inspires and gives you practical techniques and exercises, there are far better books out there. Any decent script writing book, will cover most of the basics. Comics being a unique medium with different strengths and weaknesses to film, has of necessity, it's own story telling techniques, and here, to his credit, Stan Lee pretty much covers them all. But honestly, you can learn all that with one Will Eisner and one Scott McCloud book. In far greater detail.
But the book has charm, and is not without merit. It's chock full of interviews from working professionals; mostly quotes really, culled from other sources and used to illustrate various points throughout the book. Some sources are wrangled specifically for the book (Roy Thomas, Marv Wolfman, Len Wein and the last two chapters, where he interviews current editors about what they look for in a script and what they want from their writers). It's also full of personal anecdotes from his days of writing comics, which stretches from the 40's to the 70's and gives a good overview of the history of comics, and how the medium has changed. That's the fun part. The "he was there for most of it" part. The man has seen, and even helped develop many of the working methods (writing the plot driven outline and scripting later) and techniques used in comics today. What he didn't have a hand in directly, he was at least in the near periphery to observe. And, to be honest, there is a strong and even pleasant "geek factor" as he goes down memory lane that makes the experience of reading the book a pleasure, even while hoping for something more substantive in its analysis of various techniques for story telling.
There's not a lot of books out there, though, which are geared specifically to the comics writer. I haven't read the Denny O'Neil or Peter David books, but I'd say, in terms of providing a check list at least, of things to keep in mind as your writing your story, it does deserve a place on your writing bookshelf.
It's chock full of a lot of art reproductions, some from the Marvel era of the 60's, most (it's true) from current DYNAMITE titles (which are currently reprinting the 70's Warren publishing titles like Eerie, Creepy, and Vampirella - so that's kind of cool) but that doesn't bother me, so long as it serves to illustrate the point (which it does). It also references titles as contemporary as a mere few months ago and interviews its subsequent creators, such as Brian Michael Bendis among others. So it's a very contemporary book as well.
So, to sum up: the book has a light, breezy, almost conversational tone, that covers techniques and working methods utilized from the earliest days of comics history, and then amended, developed, or simply added to, in its' current, more adult incarnation. But for a book that purports to be a guide on "How To Write Comics", it's a little too light on substance, and you might be better served starting with Scott McCloud's Understanding Comics. The Marvel fan will love it, though.