Question: Who published the book to which the novel Armor has superficial similarities ?

Context paragraphs:
The Spanish Prisoner: The Spanish Prisoner is a 1997 American neo-noir suspense film, written and directed by David Mamet and starring Campbell Scott, Steve Martin, Rebecca Pidgeon, Ben Gazzara, Felicity Huffman and Ricky Jay.  The plot entails a story of corporate espionage conducted through an elaborate confidence game.  In spite of the film's title, the actual plot includes only superficial similarities to the Spanish Prisoner scam.

Starship Troopers: Starship Troopers is a military science fiction novel by U.S. writer Robert A. Heinlein.  Written in a few weeks in reaction to the U.S. suspending nuclear tests, the story was first published as a two-part serial in "The Magazine of Fantasy & Science Fiction" as Starship Soldier, and published as a book by G. P. Putnam's Sons in December 1959.

Japanese grosbeak: The Japanese grosbeak ("Eophona personata") is a finch native to East Asia.  It is also sometimes referred to as the Japanese or masked hawfinch due to superficial similarities to the well-known Eurasian species.

Solanum abutiloides: Solanum abutiloides is a species of plant in the Solanaceae family.  It is endemic to Argentina and Bolivia, and thrives as a weedy plant in rocky land, on stream banks, and scrub land between 900-3600 meters in elevation.  It is also known as dwarf tamarillo, due to superficial similarities with "Solanum betaceum".  Both plants are noted for very rapid growth from seed, and very strongly fragrant foliage.  "Solanum abutiloides" is also sometimes known by the archaic "Cyphomandra sibundoyensis".

Australian brushturkey: The Australian brushturkey or Australian brush-turkey ("Alectura lathami"), also frequently called the scrub turkey or bush turkey, is a common, widespread species of mound-building bird from the family Megapodiidae found in eastern Australia from Far North Queensland to Illawarra in New South Wales.  The Australian brushturkey has also been introduced to Kangaroo Island in South Australia.  It is the largest extant representative of the family Megapodiidae and is one of three species to inhabit Australia.  Despite its name and their superficial similarities, the bird is not closely related to American turkeys, nor to the Australian bustard, which is also known as the bush turkey.

Parvancorina: Parvancorina is a genus of shield-shaped bilaterally symmetrical fossil animal that lived in the late Ediacaran seafloor.  It has some superficial similarities with the Cambrian trilobite-like arthropods.

Close Action: Close Action is a naval board wargame published by Clash of Arms in 1997 and designed by Mark A. Campbell.  The game replicates naval warfare of the 18th and early 19th centuries.  The game was inspired by and shares superficial similarities to the Avalon Hill game "Wooden Ships and Iron Men" ("WS&IM").  It was created chiefly in response to perceived errors in the simulation found in "WS&IM".

Men in Trees: Men in Trees is an American romantic television comedy-drama series starring Anne Heche as relationship coach Marin Frist, which premiered on September 12, 2006, on ABC.  The series is set in the fictional town of Elmo, Alaska, and concerns Marin Frist's misadventures in relationships.  The premise showed at least superficial similarities to the HBO television series "Sex and the City" (on which series creator Jenny Bicks was a co-executive producer), which also featured a romantically oriented female writer.  The protagonist's apparent "fish-out-of-water" feeling in a remote, small Alaskan town can be likened to CBS's "Northern Exposure".  The protagonists in both series were New Yorkers thrust into small town Alaskan societies.  Filming for the series was based in Squamish, British Columbia, Canada.

Armor (novel): Armor is a military science fiction novel by John Steakley.  It has some superficial similarities with Robert A. Heinlein's "Starship Troopers" (such as the military use of exoskeletons and insect-like alien enemies) but concentrates more on the psychological effects of violence on human beings rather than on the political aspect of the military, which was the focus of Heinlein's novel.

Little Audrey: Little Audrey (full name: Audrey Smith) is a fictional character, appearing in early 20th century folklore prior to her appropriation as the star in a series of Paramount Pictures' Famous Studios cartoons from 1947 to 1958.  She is considered a variation of the better-known "Little Lulu", devised after Paramount decided not to renew the license on the comic strip character created by Marjorie Henderson Buell (AKA: "Marge").  Despite some superficial similarities between the two characters, the Famous animators were at pains to design Audrey in contrast to Lulu, adopting an entirely different color scheme and employing the stylistic conventions common to Famous Studios' later 1940s repertoire, as opposed to Buell's individualistic rendering of Little Lulu.  Veteran animator Bill Tytla was the designer of Little Audrey, reportedly inspired by his daughter Tammy (who was also his inspiration for Famous' version of Little Lulu, on which he also worked and for which he directed several shorts).  The original voice of Little Lulu was performed by actress Cecil Roy (who also provided the voice of "Casper the Friendly Ghost").  Little Audrey was instead voiced by Mae Questel, who also voiced most of Paramount's other major female cartoon characters including Betty Boop and Olive Oyl.

Supporting paragraphs: Armor (novel) Starship Troopers
Answer: G. P. Putnam's Sons