The ​“How Did It Hap­pen?” series pro­vides a straight­for­ward guide to major turn­ing points in mod­ern his­to­ry, and includes quo­ta­tions from speech­es, let­ters, diaries, con­tem­po­rary pho­tographs, per­son­al quotes, and opin­ions from var­i­ous his­to­ri­ans. It also includes a glos­sary, chronol­o­gy, bib­li­og­ra­phy and index. As the pub­lish­er has pre­vi­ous­ly pub­lished thought­ful, reflec­tive, com­pre­hen­sive his­to­ries of the Holo­caust, it is cer­tain­ly their right to draw from these, sim­pli­fy­ing and short­en­ing the text with­out dis­tort­ing it. In oth­er words, this is a respectable sum­ma­ry of the Holo­caust with large pho­tographs and reduced text — rather like a his­tor­i­cal ​“Cliff’s Notes” of the Holo­caust. Ages 10 and up.