Enigmas y misterios de la Segunda Guerra Mundial: Desapariciones, muertes y sucesos inexplicados del mayor conflicto bélico de la historia (Historia Incógnita)
Extensive, very well documented compilation of WW2 disappearances, secret missions and other inexplicable stories. Easy to read for those unfamiliar with WW2, provided with helpful footnotes to clarify or extend what's written on the pages. The only critique I have is for the last section dedicated to 'myths' or rumor-based stories... it's boring, to be honest. But other than that it's a great read.