At this point, they realized there was a need for more accurate and reliable doll information, and their writing and photography careers began.Jan Foulke has written and Howard Foulke has done the photography for the following books: Kestner, King of Dollmakers; Simon & Halbig Dolls, Doll Classics, Focusing on Dolls, Effanbee Composition Dolls, Treasury of Madame Alexander Dolls, Gebruder Heubach