A qualitative codebook developed from n = 130 first-time fathers of 18-month old children participating in the Baby Books 2 parenting intervention. During a home visit, fathers were asked the following questions: 1) "What does it mean to be a good father?", 2) "What makes you want to be a good parent?", 3) "What are the benefits of being a good parent?", and 4) "What are the costs of being a good parent?" Responses were video-recorded and transcribed by Spanish-English bilingual research assistants. A team of five researchers used thematic analysis to analyze the transcript data and produce the codebook, capturing emergent themes and subthemes in fathers' responses.