The NEW KNITTER'S TEMPLATE is a book of charts intended for experienced knitters to use in designing various styles of garments, in yarns of different gauges, to fit bust/chest sizes 30" to 60". The book is not so much about achieving custom fit, as it is about telling a knitter how many stitches to cast on, increase, and decrease to obtain the desired size and shape of a standard knitted garment component (e.g., back, front, sleeve) when using different gauges of yarn.
The authors provide a schematic "Style Diagram" drawing showing basic knitted garment styles (e.g., straight body back, v-neck front, cap sleeve). This schematic is used in conjunction with a "Blank Pattern Worksheet" and "The Templates" to create garments with specific bust/chest measurements using yarns of different gauges. The knitter takes her/his body measurements, selects a style out of the possible components, and then chooses a bust/chest size depending on the amount of ease desired. At this point, the knitter goes to the template for the yarn gauge (e.g., 5-1/2 stitches and 7-1/2 rows equals 1 inch), and finds the column headed by the selected bust/chest size (e.g., 36 inches). The knitter can then find the number of stitches to cast on, increase, and decrease (including number of times to increase and decrease) for each standard-shaped component part for the selected style. The knitter then writes these numbers down in the appropriate areas of the pattern worksheet. Voila! The knitter now has a pattern for the project.
Basically, the templates do the math for the knitter. They substitute for a software "sloper" (e.g., Cochenille's top-of-the-line "Garment Designer"), which will write out knitting instructions after the knitter selects a style and inputs figures for body measurements and yarn gauge into appropriate fields. But unlike the software programs, the NEW KNITTER'S TEMPLATE does NOT give templates for garments that will "custom fit" persons with "non-standard" body measurements (e.g., small bust, wide hips). Instead, the templates are based only on bust/chest size and standard garment component shapes. If a knitter has wide hips and simply follows the directions for the bust/chest measurement, the knitter will end up with a garment that is too narrow at the hips.
The NEW KNITTER'S TEMPLATE does include a few pages of general discussion about adding ease to various styles, to help the knitter choose the appropriate template to follow in compensating for different body types. However, I found the book to be difficult to use, and to be little more than a collection of pattern-writing charts. For these reasons, I rate it at 3 stars ("it's okay" on the official Amazon scale). If you're looking for a book that will really help you achieve a custom fit, by making a personal pattern based on your specific body measurements, then you might want to consider Jean Frost's excellent Custom Knit Jackets: Casual to Couture.