8 ▁birth s ▁Category : 1 6 1 1 ▁death s ▁Category : 1 7 th - century ▁German ▁people ▁Category : M arg ra ves ▁of ▁Brandenburg <0x0A> </s> ▁The ▁Great ▁American ▁Baseball ▁Card ▁F li pping , ▁Tr ading ▁and ▁B ubble ▁G um ▁Book ▁( L ittle ▁Brown , ▁ 1 9 7 3 ) ▁is ▁a ▁book ▁written ▁by ▁Br end an ▁C . ▁Bo yd ▁& ▁Fred ▁C . ▁Harris ▁about ▁baseball ▁cards , ▁primarily ▁ones ▁issued ▁during ▁the ▁ 1 9 5 0 s ▁and ▁ 1 9 6 0 s , ▁and ▁the ▁players ▁on ▁the ▁cards . ▁ ▁Auth ors ▁ ▁Ne ither ▁Br end an ▁C . ▁Bo yd ▁nor ▁Fred ▁C . ▁Harris ▁had ▁published ▁any ▁books ▁nor ▁possessed ▁any ▁special ▁expert ise ▁in ▁the ▁field ▁of ▁sports ▁or ▁sports ▁memor abil ia ▁when ▁they ▁decided ▁to ▁write ▁The ▁Great ▁American ▁Baseball ▁Card ▁F li pping , ▁Tr ading ▁and ▁B ubble ▁G um ▁Book . ▁ ▁In ▁ 1 9 7 0 ▁while ▁both ▁were ▁employed ▁at ▁a ▁Boston , ▁Mass . ▁book store , ▁a ▁customer ▁in quired ▁about ▁books ▁on ▁baseball ▁cards . ▁ ▁Sur pr ised ▁to ▁learn ▁that ▁there ▁wer en ' t ▁any ▁works ▁on ▁the ▁subject , ▁Harris ▁told ▁Bo yd , ▁" we ▁should ▁write ▁one ." ▁So ▁they ▁por ed ▁over ▁the ▁cards ▁they ▁had ▁collected ▁in ▁their ▁youth ▁and ▁wrote ▁The ▁Great ▁American ▁Baseball ▁Card ▁F li pping , ▁Tr ading ▁and ▁B