Perhaps you should try some spelling variations:
"a robert e. hellman book" » "a robert e. hellman joel", "a robert e. german book", "3 robert e. hellman book", "dr robert e. hellman book", "a robot e. hellman book", "a robert _. hellman book", "a robert j. hellman book"
"a robert e. heimann book" » "a robert e. german book", "3 robert e. heimann book", "dr robert e. heimann book", "a robot e. heimann book", "a robert _. heimann book", "a robert j. heimann book"
"a robust e. heilman book" » "a robust e. german book", "_ robust e. heilman book", "a robust _. heilman book", "a robust a. heilman book", "a robust end. heilman book"

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