The VisualEditor is currently available as an opt-in beta feature on cs.wikibooks.org. Please make it enabled by default to all users, to make editing more accessible for editors who don't know wikitext.
On-wiki discussion: https://cs.wikibooks.org/wiki/Wikiknihy:Port%C3%A1l_Wikiknih#Zprovozn%C4%9Bn%C3%AD_vizu%C3%A1ln%C3%ADho_editoru_na_wikibooks. No opposes/supports => this should be fine to go out, as cswikibooks is a small project.