Aha!
But, alas, I don't think a book is enough for me. I need a psychiatrist. No. I don't need a psychiatrist. I need a whole team ♦
A little bit more seriously: The term variance is thrown around quite randomly some times. It's (understandably) used to explain shorter downswings, (but never ever ever upswings), both by those who suffer from them, and by their psychiatrists.
To respond to the original post: I don't think that you need a variance book as a first resort.
First make sure that you know what variance is - in exact mathematical terms. Then, analyze your hands. You should be able to parse trough all of them if you have tracking software (1500 hands moving up to NL5?). Most player don't know the exact definition of variance. It suffices to say here that it has close to nothing to do with moving up and down in limits. It also has quite little (still something though) do do with edge over opponents. You can be a dog and still have lower variance than a winning player. If you go from a 60% favourite to a 55% favourite, then your expected variance is likely decreasing, not increasing.
There is also expected variance and measured variance. They need not coincide, To wit, you will have variance of variance. You will have variance of variance of ..., ad infinitum. Luck exists - but only in the rear view mirror.
If you actually carry trough that type of analysis, you are probably going wo find that you either played pretty badly in a couple of spots or were unlucky in a couple of spots. If you find that your flopped sets were cracked 17 times of 30, well, you weren't lucky. If you lost 14 buy-ins with TPTK and won only 9 buy-ins with the same hand versus that loose dude always calling you behind preflop, well ..., chances are that the dude behind isn't that bad. If you played three 400 BB all in hands and lost all of them (entirely possible) in coinflips, you were certainly unlucky. You still may have played badly the other 1497 hands.
Unless you post a bunch of hands for analysis, nobody (psychiatrists or mathematicians or not) can tell you if you could have done much better when it comes to playing. Luck exists - but only in the rear view mirror.
Fellow strategist ragney does put the emphasis in the right place. Hats off to him! Hell, I too need that kick in the arse too once per week - at least. Instead of analyzing why the f-ck i lose X sessions when i made that particular brilliant calldown session Y when blablabla...
/ Johan =