If you want to understand the whole chemistry, the ins-and-outs of sourdough bread-baking from Tartine's perspective and with its history weaved in, then it's a beautiful, lengthy, well-illustrated read for that purpose.
But if you've read the whole book to the last page and all you want is to roll up your sleeves and make bread RIGHT NOW, then this book is a true nightmare to follow. I had to flip around 30 pages back and forth for a whole hour to reduce some resemblance of a recipe from it into my notebook - something I could look at while bread-making and to follow step by step.
Also, if I'm not mistaken, the book does mention the importance of pre-planning and even how their colleague has created a lovely timechart for that purpose, as the dough will need attention at pretty strict times. BUT nowhere does it hand out instructions on how exactly to adapt the bread-making timeframe to your life (that exact chart would've been super helpful), and how much time to set aside for each step to understand when you should start the process to have fresh bread by time X - let's say, Saturday morning (I now know I have to feed the starter at 8am on Friday and make sure I set aside the whole Friday evening starting from 5-6pm for that purpose).
I had to deduce that all by myself and fail hard the first few times, as for example my first loaves got ready for baking around 3am, so by the time I actually got to baking them, they turned into a deflated mess.
I actually found Youtube videos much more helpful in understanding the timing and handling of the dough.