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In this book I found many missing pieces of what I needed to start development on ARM. They are usually not mentioned in device data-sheets which assume at least some knowledge of the subject. Due to this book I was able to complete my first ARM project. It is very clearly written and in contrast with other similar books, it does not reduce to rewriting the data-sheets. I like in particular a very through section on how to design low-power applications. Even if the discussion in this section is based on NXP devices, the entire approach can be easily adjusted to other families. That is what I did for Freescale Kinetis. If you are new to ARM and target to Cortex-M0/M0+, I highly recommend this book.