This book is a real classic (mine is soup-stained from years of use.)
It is actually surprising how easy it is to make that cup of warm, cloudy soup you get in the sushi bar. The only problem is the dashi (fish broth) that is commercially available. It is usually loaded with MSG. You can make your own broth from bonito flakes per this book, if you have a Japanese grocery, but if you don't have a Japanese grocery or don't eat fish, vegetable broth works just fine with a dash of soy sauce.
This book has many, many soup ideas, as well as some delicious Asian noodle recipes, and uses for miso that replace things like cheese. The meaty taste of miso results from natural amino acids, which provide the savory flavor similar to meats and cheeses. If you are becoming vegetarian, miso can replace that familiar taste.