I often get asked what books are there to help me get started. Of course there are hundreds and a lot depends on you and your personal preferences and also how the author of the book comes across.
But one book I, and those I have recommended this book to, agree this has to be one of the best. It is neutral when it comes to different paths and not only is a good read packed full of information but it can be used as refence book.
This book has everything a Witch could want and need between two covers: a magical cookbook, encyclopaedia, dictionary, and grimoire. yet is grounded in the magical work of centuries past. It is organised so that readers can skip over the parts they already know, or read each section in alphabetical order.
Available here