I was struggling so much before I bought this book! It hashelped me so much! I would highly recommend, and even if you dont have time to read it there are frequent summaries of key points that are super useful!
I am in the process of writing my undergraduate dissertation and was recommended to purchase this book to help me along. So far I have found it to be useful, it has a lot of information in it to help you with different aspects of your dissertation. If you are looking for a 'handbook' style text to help you through, I would recommend this one.