Considering how penetrating each and every one of Apple's devices has been in the personal tech market, it's no wonder iTunes continues to make loads of money. It wouldn't happen without the individual contribution of each of iTunes' millions of users. But just how much app, song and movie money does each person contribute to Apple's world domination each year?

The Guide to Baby Sleep Positions

• $7
• Barnes & Noble

Surely the best antidote to the indignities of parenthood is humor. Andy Herald and Charlie Capen of How To Be A Dad have turned a blog feature into a hilarious book documenting the array of gut-kicking, back-jamming sleep positions babies employ when sharing your bed to ensure their own comfort. 

Vader's Little Princess

• $14.95
• Chronicle Books

The equally funny companion to Darth Vader and Son, this book is perhaps aimed more at adults than kids, making it the perfect Mother's Day gift for a Star Wars lovin' mom. There's also a terrific free poster you can download.

Baz Luhrmann's adaptation of "The Great Gatsby" hits theaters on May 10. It seems like people have been talking about it forever, from its star-studded cast to its soundtrack featuring contemporary artists like Lana Del Ray, Beyonce, and Florence + The Machine. Honestly, I only care about two things: the fashion and the interiors.

Over the years, Apartment Therapy has focused quite a bit on marble: cleaning and maintaining it, protecting it, rehabbing it, faking it, using it in bathrooms, using it Shaker-style, the pros and cons of white marble countertops, scoring marble on a budget, and so much more. I was fascinated, then, to see Tauba Auerbach's celebration of marble, in book form...

Artist Gwenn Semeel has created a children's book and a series of paintings based on her research into the incredible variety of gender roles, family structure, and partnering in the animal kingdom...

Mr. Flux  by Kyo Maclear

• $12
• Barnes & Noble

I'm sure Mr. Maclear is very talented but what drew me to this book were the illustrations by Matte Stephens whose work is always retro, quirky and delightful.

Books like these are the reason I will never be able to convert to a Kindle. Yes, I understand that a Kindle is lightweight, easy to hold and able to store thousands of books at a time. But it doesn't have a cover that makes me smile, just looking at it.  It can't hold its own as a work of art sitting on a shelf. And it can't be collected with other Kindles and be transformed into more than the sum of its parts. Not like books. Not like these books, especially...

Pete's A Pizza

• $12.50
• Powells

How to cheer up Pete on a rainy day? Make him into a pizza! This book will have you giggling and making pies out of your own kids.

My family is coming to San Francisco for a week, and though there are a million things they're excited to see, they share my belief that a pleasant vacation must include some downtime. To that end, I bought them each a book- after all, some of my favorite days have been spent reading over coffee and a donut at Four Barrel or in the sun in Dolores Park...