In the Oreilly days if you wanted to learn about a language there were 3 options. 1/ Learn the language with exercises - Fun book but you only use it once 2/ T

In the Oreilly days if you wanted to learn about a language there were 3 options. 1/ Learn the language with exercises - Fun book but you only use it once 2/ The definitive reference guide - that was the book I had on my desk with post its in. 3/ The cookbook - solving real world problems with examples Mostly I got the 2nd and 3rd options and didn't bother with the 1st. I think this concept was the best. Even for example command line tools. I read it once but I re-read it occasionally. You forget what is possible with the tool when first learning it. The next rounds will create a-ha moments and you pick new stuff up.