I'm a completely self-taught sewist. I've never taken hands-on classes or lessons; everything I know, I've learned from reading books and sewing web sites, or watching the sewing shows on TV (thank you Sandra Betzina!)
Perhaps because of this, I've always been interested in what's available for beginners who are trying to teach themselves how to sew.
For the last several years, there hasn't been much. I myself learned from old library books, most of which were good, but not very inspiring--and some were downright intimidating. Occasionally, I'd come across a new book geared toward beginners, but the fashions were either shapeless or strange, or too "crafty" for my taste.
If you're wanting to learn to make your own clothes, what you really need (in my opinion) are books that show you how to make real-life garments that you can use to build a wearable wardrobe, while building your skills.
The books I'm recommending today are my favorites for beginners because:
- They don't require a lot of extra start-up supplies. They focus on the essentials which most people can find locally.
- The patterns used are simple and they are arranged in order of difficulty, so you can follow each book like a sewing course.
- They encourage you to use your imagination and not be completely dependent on patterns for sewing.
- The clothing styles are current and attractive, and they're all wardrobe basics which you can make over and over again (for lots of practice!) but without getting bored.
If you're an absolute beginner, probably the best books to start with are the
Sew U books by Wendy Mullin.

The first book,
Sew U, shows you how to get started with the absolute minimum supplies. The books even include three patterns specifically geared toward wardrobe-building: a skirt, a shirt, and a jeans-style pant. These can be made in a variety of fabrics, and the author also offers suggestions for changing up the pattern designs to expand your wardrobe.
Sew U Home Stretch is designed to be used after you've mastered the basic skills taught in Sew U. As the name implies, it is a course in sewing knit fabrics. This book continues the "basic wardrobe" theme by offering patterns and design variations for a knit t-shirt, a hoodie, and a dress. If you have a serger, it provides a short but helpful explanation of serger functions and instructions for using the serger on the included projects. If you don't have a serger, all the projects can be completed on a sewing machine and she provides instructions for that as well.
A downside of these books is that the patterns are not suited for larger sizes. I think the largest bust measurement used is 38.5", which is comparable to a size 12 in ready-to-wear. However, please don't let this deter you from taking a look at these books. The instructions could easily be adapted to any basic shirt/skirt/pant pattern available at your local fabric store. In fact, they are designed to help you learn to construct a garment, without being "tied" to specific pattern instructions.
Another new and different book which I really like is
Sew What! Skirts by Francesca
DenHartog. 
This book goes beyond encouraging you to alter a pattern design--in fact, it shows you how easy it is to skip the commercial pattern altogether, and make your own! And it does it in a very unintimidating manner:
Y ou take a few simple measurements,

And you draw your pattern on paper:
(Photo is purposely blurred to prevent copying)
What you see here are instructions for
three different skirt styles. (See? Pattern drafting is really not rocket science. :) )
The great thing about the book is that it is filled with beautiful pictures, so you can see that "beginner" skirts don't have to look "home-made". Granted, some of those cool Japanese prints are hard to find-- but it's not that difficult to find equally suitable fabrics and trims locally or online. The author recommends cottons for the first projects, for easy sewing.
Another book in the same series is called
Sew What! Fleece by Carol Jessop. This book uses the same principal of drafting your own simple patterns to make easy fleece garments. I'm not a huge fan of fleece, but I think this would be a fun book to experiment with.
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None of the above books are complete guides to sewing; and in general they do tend to downplay the benefit of taking the time to learn other techniques which would yield nicer, more professional results. But I still recommend them because they offer so much to the individual who is just wanting to get started.
Once you're ready to move beyond basics and cotton and refine your skills, there are a couple more books I'd recommend:
I can't sew without this book. Seriously. This book tells you which supplies (needle, thread, interfacing, machine feet) work best for a variety of fabrics. You can avoid a lot of problems by using the right supplies. And it also tells you how to prepare the fabrics and how best to press them, etc. There are other fabric guide books out there, but I always find myself turning back to this one. It's got a very friendly and readable format--just enough information for any project.
And finally, I think every sewist needs a good sewing "encylopedia". This type of book covers virtually all the different sewing techniques you'll ever need to know. The best one, I think, is
The Reader's Digest Complete Guide to Sewing by Robert Dolezal. I don't actually own this one, but I plan to buy it ASAP. (I've always used the Vogue Sewing book but I think the Reader's Digest book is better.)
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I purposely didn't include fitting books in this post. Fitting is a huge topic in itself.
But I will say this: You can manage a lot of fitting issues simply by using the multi-size lines on patterns, and then by learning a few simple alterations which are illustrated in most sewing encyclopedias.
(My guess is that, once you've drafted a few of your own garments from the
Sew What! series, you won't think fitting is such a big deal anyway.)