Being a fan of Lego, and trying to find more about Custom Lego minifigs, I decided that doing some back ground research would help inspire custom minfig designs and educate on what to consider when building custom minifigs. It’s often worth doing some background reseach when taking on any project, and Lego minifig customization is no different, there are a whole range of Lego books out there, some are educational, whilst others are more instructional and will benefit any Lego projects you take on, however in terms of books specific to Lego minifig customization, there isn’t any written book about this area of Lego customization, however you’ll find most of this information online and of course, here, at customminifig
Nevertheless heres a slide show of books relating to Lego customization as well as vinyl figures (another area that Lego minifig customization would cross over)