I think that this book is maybe for beginners who've not had experience with makeup before, but professionals can also buy it too and I'm sure you'll find something you didn't already know! It has little everyday beauty tips, and even has chapters focused on stress, hair care and nails which every so often features frequently asked questions regarding that topic.
It gives tips on makeup tools and brushes, and shows the before and after photos of using just one product like concealer and mascara. I find face mapping so incredibly interesting and there's even a full page on what your spots and blemishes mean on your face! This has helped me to reduce the amount of breakouts on my face and when I unfortunately do get a huge breakout, I know what to do to not get the same one again!
The book is filled with pretty photos of Lauren and lots of makeup tutorials that will suit everyone. I highly recommend this book if you want to learn a little bit more on the whole 'makeup and beauty' subject, and maybe even just for a fun read flicking through the effortlessly beautiful photos! My favourite section was the 'beauty through the decades' section, where she acted out and noted down about every decade style from the 20's all the way through to the 70's.