The Second Volume of the Capital Adequacy Handbook of Banks by Márton Radnai, Nikolett Bóta and Dzsamila Vonnák is published. The handbook overviews the banks’ capital requirement regulations with an emphasis on the Hungarian rules. The aim of the banking regulation is to make the banks handle their risk properly. One of its tools is the capital adequacy, that is to set the minimum of the regulatory capital. Unlike other business enterprise – where the funding role of the capital is emphasized – in case of the banks the essential role of the capital is to ensure safety, that is, to absorb the asset side losses. The capital adequacy rules set in detail the amount and composition of the capital banks have to hold to cover their unexpected losses. The handbook overviews this topic, it helps the understanding of the concerning rules with explanations and examples. This volume summarizes the changes that have happened since the publication of the first volume.