Last year California photographer Seth Casteel became an overnight sensation for his zany underwater portraits of man's best friend. His books and calendars are still a great gift idea for any dog lovers in on your gift list.

See more from Seth here:

Underwater dogs are the focus of Seth Casteel's 2014 calendar, a perfect holiday gift.

Seth's book Underwater Dogs was the best selling photography book of 2012, with over a quarter of a million copies sold in less than one year. There's also Underwater Dogs for Kids. And his next book, Underwater Puppies, will be published in October 2014.

He's even got cat lovers covered (though they aren't underwater, for obvious reasons.) View Seth's cat gallery

Seth Casteel in action

Seth Casteel in action

Check out his website

And like Seth on Facebook