diff --git a/UltiSnips/markdown.snippets b/UltiSnips/markdown.snippets
index 20194f5..881575e 100644
--- a/UltiSnips/markdown.snippets
+++ b/UltiSnips/markdown.snippets
@@ -52,3 +52,17 @@ endsnippet
 snippet ,m "Math equation" A
 \$$1\$ $0
 endsnippet
+
+snippet bookshelf "Tagline for bookshelf" b
+`!p
+if t[1] != "":
+	snip.rv = "[CW: "
+else:
+	snip.rv = ""`$1`!p
+if t[1] != "":
+	snip.rv = "]"
+else:
+	snip.rv = ""`
+${2:Title} by ${3:Author}
+${4:Description}
+endsnippet
diff --git a/lua/ada_mode.lua b/lua/ada_mode.lua
index d2e6c1d..4ed63c0 100644
--- a/lua/ada_mode.lua
+++ b/lua/ada_mode.lua
@@ -3,11 +3,22 @@ if vim == nil then
 	local vim = {}
 end
 
+-- @name Prove
+-- @param
+-- @short Run gnatprove
+function Prove()
+	vim.cmd("new")
+	local run_cmd = { "alr gnatprove" }
+	vim.api.nvim_buf_set_lines(0, 0, -1, false, run_cmd)
+	vim.cmd(":%!bash")
+end
+
 -- @name setup_ada
 -- @param
 -- @short Verify installation of ada tools or install them.
 local function setup_ada()
 	vim.keymap.set("n", "<leader>cb", ":!gnatpp %<cr>")
+	vim.keymap.set("n", "<leader>pp", ":lua Prove()<cr>")
 	vim.opt.tabstop = 3
 	vim.opt.shiftwidth = 3
 end