The Key of Solomon, also known as The Greater Key of Solomon, is a pseudepigraphical grimoire attributed to King Solomon. It probably dates back to the 14th or 15th century Italian Renaissance. It presents a typical example of Renaissance magic.
A group of pentacles from the Hebrew manuscript (BL Oriental 14759, fol. 35a)
A grimoire is a textbook of magic, typically including instructions on how to create magical objects like talismans and amulets, how to perform magical spells, charms, and divination, and how to summon or invoke supernatural entities such as angels, spirits, deities, and demons. In many cases, the books themselves are believed to be imbued with magical powers, although in many cultures, other sacred texts that are not grimoires have been believed to have supernatural properties intrinsically. The only contents found in a grimoire would be information on spells, rituals, the preparation of magical tools, and lists of ingredients and their magical correspondences. In this manner, while all books on magic could be thought of as grimoires, not all magical books should be thought of as grimoires.
Page from the Greek Magical Papyri, a grimoire of antiquity.
A man inscribed in a pentagram, from Heinrich Cornelius Agrippa's De Occulta Philosophia (Eng., Three Books of Occult Philosophy). The signs on the perimeter are astrological.