It depends on what you mean by "read and understand".
My approach with something like this is to breeze through it a first time, just to understand the main point of each section and how it all fits together. If you spend 30s/page on average (obviously there will be a lot of variation), that's 7.5 hrs -- two mornings, afternoons, or evenings.
And for most people, that will provide 90% of the value. And you know what to look up, where, when you need it in the future. And you also know whatever part you might be personally interested in more, and you can go back and read those sections in more detail.
This approach works well with all types of non-fiction, and it can actually be really helpful to first "skim" through every non-fiction book you read, before reading in detail -- knowing in advance where the author is going can often help remove a lot of confusion.
My approach with something like this is to breeze through it a first time, just to understand the main point of each section and how it all fits together. If you spend 30s/page on average (obviously there will be a lot of variation), that's 7.5 hrs -- two mornings, afternoons, or evenings.
And for most people, that will provide 90% of the value. And you know what to look up, where, when you need it in the future. And you also know whatever part you might be personally interested in more, and you can go back and read those sections in more detail.
This approach works well with all types of non-fiction, and it can actually be really helpful to first "skim" through every non-fiction book you read, before reading in detail -- knowing in advance where the author is going can often help remove a lot of confusion.