The size and massive detail in this new book on identifying the gulls of the Northern Hemisphere is likely to deter most readers from more than a cursory leafing through its lovely paintings and photographs. But if you're curious to learn more about these common but highly varied, many-shades-of-gray birds around us, and you happen to live in a coastal area as I do, with more than a few gulls that are hard to identify during the winter, this might be a book to look into more thoroughly.
A caution though: gulls can be notoriously difficult to identify accurately, since they have so much finely detailed, age-related plumage variation. But an effort to simply knuckle-down and learn more about all this, such as this book amply provides, can pay off greatly in much greater detective-fun trying to figure out all these heretofore anonymously gray gulls sailing and prowling around us here each year. It's already helped me develop better skills in figuring out nearly all the varied groups of gulls around us here more quickly than I would have heretofore thought possible. And to more quickly decide which birds you can or cannot more accurately identify...and why.
The detailed accounts and maps of the distribution and relative abundance of various gull species have also helped me better understand where the gulls that migrate through or winter in our area are likely to have come from. And, finally, as you delve more deeply into what's known about all these gull species, and their European and Asian counterparts, it becomes obvious that the series of beautiful, comparative paintings and color photographs provided in such detail for each species in its various age-plumages, subspecies, and hybrid-forms is worth the price of the book alone.