Okay, so where to start...
Basically she wrote that Veronika Vitková is the worst ever possible team mate you can have in a team, Vitkova is by her words a strongly negative and bad person. for example she talks about other people behind their back etc.., she thought (Vitkova) that she was still/always the biggest star and couldn´t swallow the fact that Gabriela became the bigger star so she started bullying Gabriela and forced the whole team to join in this war against Gabi...for example to not speak with her, sit around table the way Gabriela couldn´t find a place and had to eat alone, etc...
Then she apparently accused the whole bunch of coaches, from her first coach to be the cause of her health problems during her younger ages and then the national team coaches Rybář and Vítek to cause her the problems with her legs because of bad trainings and skiing methods they were forcing her to parctice and because of that she had to miss the whole season...plus a lot of bullying things from the NT, federation etc...in shortly a typical bitchfights..you can find everything, you just have to buy her book
There allso a chapter about her younger ages, that she lost her virginity at 15 with some Heavy Metal musician or something, I don´t remember very well. Then she admitted her problems with Anorexia and Bulimia because of her coach saying her, you are fat. and she also speaks that to have a quick sex is the best way to prepare a race a couple of hours before the start, and it helped her a lot, it was like a sort of meditation for her. I´m not joking
some links in Czech:
https://www.idnes.cz/sport/biatlon/gabriela-koukalova-versus-veronika-vitkova-kniha-jina.A180412_132136_biatlon_mt2
https://www.krajskelisty.cz/praha/19373-holky-se-tvari-sladce-a-pak-vas-za-zady-podrazi-gabina-vs-verca-divci-valka-v-biatlonu-kdo-fandi-vitkove.htm
http://www.tvnoviny.sk/sport/1915884_biatlonistka-koukalova-v-knihe-opisala-pikantnosti-zo-sukromia-prvy-sex-aj-striptiz-v-bare