| Answer | Crossword Clue |
|---|---|
| DDT | Subj. of the book "Silent Spring" |
| DST | Subj. of the book "Spring Forward" |
| DDT | "Silent Spring" subj. |
| ECOL | "Silent Spring" subj. |
| NSA | Subj. of the book "The Puzzle Palace" |
| IRS | Subj. of the book "Many Unhappy Returns" |
| OED | Subj. of the book "The Meaning of Everything" |
| IRS | Subj. of the 2005 book "Many Unhappy Returns" |
| OED | Subj. of the book "Treasure-House of the Language" |
| CIA | Subj. of the 2005 Pulitzer-winning book "Ghost Wars" |
