About

Lodestar Ledgers publishes study guides for IT and professional certification exams. One guide per exam, written against the blueprint that is current when it ships, and sized so that the domains carrying the most marks get the most pages.

What that means in practice

Most certification books are written to a page count. The result is a volume where a domain worth ten percent of your score gets the same treatment as one worth thirty, and the reader has no way to tell which is which. Every Lodestar guide is weighted instead. If troubleshooting is thirty percent of the exam, it gets thirty percent of the book.

The structure follows what is known about how people actually retain technical material. Each chapter opens with a short diagnostic, so you can skip what you already know rather than reading everything at one speed. Checkpoints interrupt at the point where recall is strongest. Concepts return across chapters on purpose instead of being taught once and abandoned. Practice questions explain why every wrong answer is wrong, because that is where the discrimination the exam tests actually lives.

Who writes them

Sean Bigelow, working solo. Each guide is researched against primary documentation, and technical claims carry citations to the source they rest on. Where a certifying body has not published something, the guides say so rather than repeating a number that circulates without a source.

What these guides are not

They are not affiliated with any certifying body, and they do not contain real exam questions. Every practice question is written for the book. Exams change, so verify the current blueprint with the certifying body before you sit, and treat their word as final where it differs from anything here.

Why Lodestar Ledgers Exists makes the longer argument. The books are the shorter one. For anything else, the contact page reaches me directly.