Bod yn Hapus, Bod yn Ti dy Hun: Canllaw i'r Arddegau

The teenage guide to boosting happiness and resilience. This positive and insightful guide gives you the tools to build your confidence, eliminate negative feelings and boost happiness in all areas of your life. Scientists reckon 40% of your happiness is within your control, that's A LOT of happiness and this book will help you to harness it... -- Cyngor Llyfrau Cymru