His publishing firm also released three MISC@1 books for children , including the NUMBER@1 PERSON@1 -LRB- `` The Toadstool '' or `` The MISC@2 -RRB- , one of the most widespread pieces of propaganda , which purported to warn about insidious dangers MISC@3 posed by using the metaphor of an attractive yet deadly mushroom .

His publishing firm released three MISC@1 books for children , including the NUMBER@1 PERSON@1 -LRB- The Poison Mushroom -RRB- , one of the most widespread pieces of propaganda .
