diff --git a/autoload/asyncomplete/sources/muttgoobook.vim b/autoload/asyncomplete/sources/muttgoobook.vim
new file mode 100644
index 0000000..c78d065
--- /dev/null
+++ b/autoload/asyncomplete/sources/muttgoobook.vim
@@ -0,0 +1,130 @@
+function! s:get_fields()
+    if exists('g:muttgoobook_address_fields')
+        "echomsg "Found g:muttgoobook_address_fields:  " . g:muttgoobook_address_fields
+        let fields = g:muttgoobook_address_fields
+    else
+        "echomsg "Using default fields..."
+        let fields = '^\s*\(from\|to\|b\?cc\):\s*'
+    endif
+    return fields
+endfunction
+
+function! s:is_address_field(section)
+    "echomsg "Checking whether we're in an address field..."
+
+    let fields = s:get_fields()
+
+    "echomsg "Section:  " . a:section
+    "echomsg "Fields:  " . l:fields
+
+    if a:section =~? l:fields
+        "echomsg "In an address field!"
+        return 1
+    else
+        "echomsg "Not in an address field..."
+        return 0
+    endif
+endfunction
+
+function! s:get_section()
+    let cur = getline('.')
+    if cur !~ '^\w\+:'
+        return getline(search('^\w\+:', 'b'))
+    else
+        return getline('.')
+    endif
+endfunction
+
+function! s:search_mutt_aliases(query)
+    let aliases = {}
+    if filereadable(expand('~/.mutt/aliases'))
+        for myline in readfile(expand('~/.mutt/aliases'))
+            if myline =~ '^alias'
+                let mylist = split(myline)
+                let myname = mylist[1]
+                if l:myname =~ a:query
+                    let addresses = join(mylist[2:])
+                    let aliases[l:myname] = l:addresses
+                endif
+            else
+                continue
+            endif
+        endfor
+    endif
+    return aliases
+endfunction
+
+function! s:query_goobook(query)
+    let addresses = {}
+    for myline in systemlist('goobook query ' . a:query . ' | sed "/^$/d"')
+        ""echomsg 'myline:  ' . myline
+        let entry = split(myline, '\t')
+        let addr = entry[0]
+        let name = entry[1]
+        let addresses[l:name] = l:addr
+    endfor
+    return addresses
+endfunction
+
+function! s:address_map(name, address)
+    return {
+                \ 'menu':  '[muttgoobook]',
+                \ 'abbr':  a:name,
+                \ 'word':  a:address
+                \}
+endfunction
+
+function! asyncomplete#sources#muttgoobook#completor(opt, ctx) abort
+    "echomsg 'Calling completor...'
+    let l:matches = {}
+    if !s:is_address_field(s:get_section())
+        "echomsg 'Not in an address field.  Exiting...'
+        call asyncomplete#complete(a:opt['name'], a:ctx, l:startcol, l:matches, 1)
+        return
+    endif
+
+    "echomsg "a:ctx['col'] = " . a:ctx['col']
+    "echomsg "a:ctx['typed'] = " . a:ctx['typed']
+
+    let l:col       = a:ctx['col']
+    let l:typed     = a:ctx['typed']
+
+    "echomsg "Getting keyword..."
+    let l:kw        = substitute(l:typed, '\c' . s:get_fields() . '\(.*\)$', '\2', '')
+    let l:kwlen     = len(l:kw)
+    let l:startcol  = l:col - l:kwlen
+
+    "echomsg "l:startcol:  " . l:startcol
+    "echomsg "keyword:  " . l:kw . ", len(l:kw) " . l:kwlen
+
+    if l:kwlen < 3
+        "echomsg "a:opt['name']:  " . a:opt['name']
+        "echomsg "a:ctx:  " . a:ctx
+        "echomsg "l:startcol:  " . l:startcol
+        "echomsg "l:matches:  " . l:matches
+        call asyncomplete#complete(a:opt['name'], a:ctx, l:startcol, l:matches, 1)
+        return
+    endif
+
+    "echomsg "Generating address dictionary..."
+    let l:address_dict  = extend(s:search_mutt_aliases(l:kw), s:query_goobook(l:kw))
+
+    "for [k, v] in items(l:address_dict)
+    "    "echomsg "Key:  " . k
+    "    "echomsg "Value:  " . v
+    "endfor
+
+    "echomsg "Getting matches..."
+    let l:matches = values(map(l:address_dict, {key, val -> s:address_map(key, val)}))
+    "echomsg l:matches
+
+    "let i = 0
+    "for k in keys(l:matches)
+    "    let l:matches[i] = l:matches[k]
+    "    call remove(l:matches, k)
+    "    let i+=1
+    "endfor
+
+    call asyncomplete#complete(a:opt['name'], a:ctx, l:startcol, l:matches)
+endfunction
+