M. Sasek ( the M is for Miroslav), was a Czech artist and author who, rather unusually, wrote travel books for children. A trained architect, he noticed that almost all tourist guides were aimed solely at adults and set about remedying the situation in glorious style. I’d love to tell you I grew up knowing his ‘This Is…’ series of books, but I first discovered them when I bought the reissued ‘This Is London’ for my nephews a few years ago. Each of the eighteen ‘This Is…’ books feature a…